1 c3ps5A_
100.0
41
PDB header: hydrolase, signaling proteinChain: A: PDB Molecule: tyrosine-protein phosphatase non-receptor type 6;
PDBTitle: crystal structure of the full-length human protein tyrosine2 phosphatase shp-1
2 c2b3oA_
100.0
42
PDB header: hydrolaseChain: A: PDB Molecule: tyrosine-protein phosphatase, non-receptor type
PDBTitle: crystal structure of human tyrosine phosphatase shp-1
3 c2shpA_
100.0
44
PDB header: tyrosine phosphataseChain: A: PDB Molecule: shp-2;
PDBTitle: tyrosine phosphatase shp-2
4 c1yguA_
100.0
28
PDB header: hydrolaseChain: A: PDB Molecule: leukocyte common antigen;
PDBTitle: crystal structure of the tandem phosphatase domains of rptp2 cd45 with a ptyr peptide
5 c2nlkA_
100.0
42
PDB header: hydrolaseChain: A: PDB Molecule: protein tyrosine phosphatase, receptor type, g variant
PDBTitle: crystal structure of d1 and d2 catalytic domains of human protein2 tyrosine phosphatase gamma (d1+d2 ptprg)
6 c3sr9A_
100.0
32
PDB header: hydrolaseChain: A: PDB Molecule: receptor-type tyrosine-protein phosphatase s;
PDBTitle: crystal structure of mouse ptpsigma
7 c1larB_
100.0
37
PDB header: hydrolaseChain: B: PDB Molecule: protein (lar);
PDBTitle: crystal structure of the tandem phosphatase domains of rptp2 lar
8 d1wcha_
100.0
36
Fold: (Phosphotyrosine protein) phosphatases IISuperfamily: (Phosphotyrosine protein) phosphatases IIFamily: Higher-molecular-weight phosphotyrosine protein phosphatases
9 d1jlna_
100.0
39
Fold: (Phosphotyrosine protein) phosphatases IISuperfamily: (Phosphotyrosine protein) phosphatases IIFamily: Higher-molecular-weight phosphotyrosine protein phosphatases
10 c2jjdA_
100.0
33
PDB header: hydrolaseChain: A: PDB Molecule: receptor-type tyrosine-protein phosphatase epsilon;
PDBTitle: protein tyrosine phosphatase, receptor type, e isoform
11 c3s3fA_
100.0
37
PDB header: hydrolase/hydrolase inhibitorChain: A: PDB Molecule: tyrosine-protein phosphatase 10d;
PDBTitle: crystal structure of the catalytic domain of ptp10d from drosophila2 melanogaster with a small molecule inhibitor vanadate
12 c2nz6A_
100.0
34
PDB header: hydrolaseChain: A: PDB Molecule: receptor-type tyrosine-protein phosphatase eta;
PDBTitle: crystal structure of the ptprj inactivating mutant c1239s
13 c2pa5A_
100.0
36
PDB header: hydrolaseChain: A: PDB Molecule: tyrosine-protein phosphatase non-receptor type 9;
PDBTitle: crystal structure of human protein tyrosine phosphatase ptpn9
14 d1lara1
100.0
41
Fold: (Phosphotyrosine protein) phosphatases IISuperfamily: (Phosphotyrosine protein) phosphatases IIFamily: Higher-molecular-weight phosphotyrosine protein phosphatases
15 c3i36A_
100.0
36
PDB header: hydrolaseChain: A: PDB Molecule: vascular protein tyrosine phosphatase 1;
PDBTitle: crystal structure of rat protein tyrosine phosphatase eta catalytic2 domain
16 c2bzlA_
100.0
34
PDB header: hydrolaseChain: A: PDB Molecule: tyrosine-protein phosphatase, non-receptor type
PDBTitle: crystal structure of the human protein tyrosine phosphatase2 n14 at 1.65 a resolution
17 d2shpa1
100.0
48
Fold: (Phosphotyrosine protein) phosphatases IISuperfamily: (Phosphotyrosine protein) phosphatases IIFamily: Higher-molecular-weight phosphotyrosine protein phosphatases
18 c2qdmA_
100.0
36
PDB header: hydrolaseChain: A: PDB Molecule: tyrosine-protein phosphatase non-receptor type 7;
PDBTitle: crystal structure of the heptp catalytic domain c270s/d236a/q314a2 mutant
19 c2oc3A_
100.0
39
PDB header: hydrolaseChain: A: PDB Molecule: tyrosine-protein phosphatase non-receptor type
PDBTitle: crystal structure of the catalytic domain of human protein2 tyrosine phosphatase non-receptor type 18
20 c2c7sA_
100.0
40
PDB header: hydrolaseChain: A: PDB Molecule: receptor-type tyrosine-protein phosphatase kappa;
PDBTitle: crystal structure of human protein tyrosine phosphatase2 kappa at 1.95a resolution
21 d1fpra_
not modelled
100.0
47
Fold: (Phosphotyrosine protein) phosphatases IISuperfamily: (Phosphotyrosine protein) phosphatases IIFamily: Higher-molecular-weight phosphotyrosine protein phosphatases
22 c2qcjB_
not modelled
100.0
38
PDB header: hydrolaseChain: B: PDB Molecule: tyrosine-protein phosphatase non-receptor type
PDBTitle: native structure of lyp
23 c2hy3A_
not modelled
100.0
41
PDB header: hydrolaseChain: A: PDB Molecule: receptor-type tyrosine-protein phosphatase gamma;
PDBTitle: crystal structure of the human tyrosine receptor phosphate gamma in2 complex with vanadate
24 d2f71a1
not modelled
100.0
38
Fold: (Phosphotyrosine protein) phosphatases IISuperfamily: (Phosphotyrosine protein) phosphatases IIFamily: Higher-molecular-weight phosphotyrosine protein phosphatases
25 d1rpma_
not modelled
100.0
39
Fold: (Phosphotyrosine protein) phosphatases IISuperfamily: (Phosphotyrosine protein) phosphatases IIFamily: Higher-molecular-weight phosphotyrosine protein phosphatases
26 d1yfoa_
not modelled
100.0
39
Fold: (Phosphotyrosine protein) phosphatases IISuperfamily: (Phosphotyrosine protein) phosphatases IIFamily: Higher-molecular-weight phosphotyrosine protein phosphatases
27 c2vexA_
not modelled
100.0
38
PDB header: hydrolaseChain: A: PDB Molecule: tyrosine-protein phosphatase non-receptor type 1;
PDBTitle: crystal strucutre of protein tyrosine phosphatase 1b in2 complex with an isothiazolidinone-containing inhibitor
28 d1larb1
not modelled
100.0
44
Fold: (Phosphotyrosine protein) phosphatases IISuperfamily: (Phosphotyrosine protein) phosphatases IIFamily: Higher-molecular-weight phosphotyrosine protein phosphatases
29 c2h04A_
not modelled
100.0
39
PDB header: hydrolaseChain: A: PDB Molecule: protein tyrosine phosphatase, receptor type, b,;
PDBTitle: structural studies of protein tyrosine phosphatase beta2 catalytic domain in complex with inhibitors
30 c2qepA_
not modelled
100.0
33
PDB header: hydrolaseChain: A: PDB Molecule: receptor-type tyrosine-protein phosphatase n2;
PDBTitle: crystal structure of the d1 domain of ptprn2 (ia2beta)
31 c2g59B_
not modelled
100.0
34
PDB header: hydrolaseChain: B: PDB Molecule: receptor-type tyrosine-protein phosphatase o;
PDBTitle: crystal structure of the catalytic domain of protein2 tyrosine phosphatase from homo sapiens
32 c2bijA_
not modelled
100.0
38
PDB header: hydrolaseChain: A: PDB Molecule: tyrosine-protein phosphatase, non-receptor type 5;
PDBTitle: crystal structure of the human protein tyrosine phosphatase2 ptpn5 (step, striatum enriched enriched phosphatase)
33 d1l8ka_
not modelled
100.0
35
Fold: (Phosphotyrosine protein) phosphatases IISuperfamily: (Phosphotyrosine protein) phosphatases IIFamily: Higher-molecular-weight phosphotyrosine protein phosphatases
34 c1l8kA_
not modelled
100.0
35
PDB header: hydrolaseChain: A: PDB Molecule: t-cell protein-tyrosine phosphatase;
PDBTitle: t cell protein-tyrosine phosphatase structure
35 c2b49A_
not modelled
100.0
36
PDB header: hydrolaseChain: A: PDB Molecule: protein tyrosine phosphatase, non-receptor type 3;
PDBTitle: crystal structure of the catalytic domain of protein tyrosine2 phosphatase, non-receptor type 3
36 c2i75A_
not modelled
100.0
35
PDB header: hydrolaseChain: A: PDB Molecule: tyrosine-protein phosphatase non-receptor type 4;
PDBTitle: crystal structure of human protein tyrosine phosphatase n4 (ptpn4)
37 d1lara2
not modelled
100.0
41
Fold: (Phosphotyrosine protein) phosphatases IISuperfamily: (Phosphotyrosine protein) phosphatases IIFamily: Higher-molecular-weight phosphotyrosine protein phosphatases
38 c1g4wR_
not modelled
100.0
16
PDB header: signaling proteinChain: R: PDB Molecule: protein tyrosine phosphatase sptp;
PDBTitle: crystal structure of the salmonella tyrosine phosphatase2 and gtpase activating protein sptp
39 c3m4uB_
not modelled
100.0
29
PDB header: hydrolaseChain: B: PDB Molecule: tyrosine specific protein phosphatase, putative;
PDBTitle: crystal structure of trypanosoma brucei protein tyrosine phosphatase2 tbptp1
40 c3jrlA_
not modelled
100.0
50
PDB header: hydrolaseChain: A: PDB Molecule: oncogenic tyrosine phosphatase shp2;
PDBTitle: crystal structure of the oncogenic tyrosine phosphatase shp2 complexed2 with a salicylic acid-based small molecule inhibitor
41 c4az1B_
not modelled
100.0
30
PDB header: hydrolaseChain: B: PDB Molecule: tyrosine specific protein phosphatase;
PDBTitle: crystal structure of the trypanosoma cruzi protein tyrosine2 phosphatase tcptp1, a potential therapeutic target for chagas'3 disease
42 d1p15a_
not modelled
100.0
41
Fold: (Phosphotyrosine protein) phosphatases IISuperfamily: (Phosphotyrosine protein) phosphatases IIFamily: Higher-molecular-weight phosphotyrosine protein phosphatases
43 d1lyva_
not modelled
100.0
19
Fold: (Phosphotyrosine protein) phosphatases IISuperfamily: (Phosphotyrosine protein) phosphatases IIFamily: Higher-molecular-weight phosphotyrosine protein phosphatases
44 d1g4us2
not modelled
100.0
19
Fold: (Phosphotyrosine protein) phosphatases IISuperfamily: (Phosphotyrosine protein) phosphatases IIFamily: Higher-molecular-weight phosphotyrosine protein phosphatases
45 c2oq1A_
not modelled
100.0
30
PDB header: transferaseChain: A: PDB Molecule: tyrosine-protein kinase zap-70;
PDBTitle: tandem sh2 domains of zap-70 with 19-mer zeta1 peptide
46 c2ozoA_
not modelled
100.0
29
PDB header: transferaseChain: A: PDB Molecule: tyrosine-protein kinase zap-70;
PDBTitle: autoinhibited intact human zap-70
47 c4fl2A_
not modelled
100.0
29
PDB header: transferaseChain: A: PDB Molecule: tyrosine-protein kinase syk;
PDBTitle: structural and biophysical characterization of the syk activation2 switch
48 c3gqiB_
not modelled
100.0
28
PDB header: transferase/transferase inhibitorChain: B: PDB Molecule: phospholipase c-gamma-1;
PDBTitle: crystal structure of activated receptor tyrosine kinase in complex2 with substrates
49 c1a81E_
not modelled
100.0
23
PDB header: complex (transferase/peptide)Chain: E: PDB Molecule: syk kinase;
PDBTitle: crystal structure of the tandem sh2 domain of the syk kinase bound to2 a dually tyrosine-phosphorylated itam
50 c3or8A_
not modelled
100.0
14
PDB header: transcriptionChain: A: PDB Molecule: transcription elongation factor spt6;
PDBTitle: a tandem sh2 domain in transcription elongation factor spt6
51 d1v3aa_
not modelled
100.0
26
Fold: (Phosphotyrosine protein) phosphatases IISuperfamily: (Phosphotyrosine protein) phosphatases IIFamily: Dual specificity phosphatase-like
52 d1rxda_
not modelled
100.0
28
Fold: (Phosphotyrosine protein) phosphatases IISuperfamily: (Phosphotyrosine protein) phosphatases IIFamily: Dual specificity phosphatase-like
53 c2xp1A_
not modelled
100.0
17
PDB header: transcriptionChain: A: PDB Molecule: spt6;
PDBTitle: structure of the tandem sh2 domains from antonospora locustae2 transcription elongation factor spt6
54 c3s4oB_
not modelled
99.9
24
PDB header: structural genomics, unknown functionChain: B: PDB Molecule: protein tyrosine phosphatase-like protein;
PDBTitle: protein tyrosine phosphatase (putative) from leishmania major
55 c3rz2B_
not modelled
99.9
26
PDB header: hydrolaseChain: B: PDB Molecule: protein tyrosine phosphatase type iva 1;
PDBTitle: crystal of prl-1 complexed with peptide
56 d2oq1a1
not modelled
99.9
30
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
57 c2y3aB_
not modelled
99.9
22
PDB header: transferaseChain: B: PDB Molecule: phosphatidylinositol 3-kinase regulatory subunit beta;
PDBTitle: crystal structure of p110beta in complex with icsh2 of p85beta and2 the drug gdc-0941
58 d2shpa2
not modelled
99.9
30
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
59 d1pica_
not modelled
99.9
24
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
60 d1a81a1
not modelled
99.9
25
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
61 c1x6cA_
not modelled
99.9
28
PDB header: signaling proteinChain: A: PDB Molecule: tyrosine-protein phosphatase, non-receptor type
PDBTitle: solution structures of the sh2 domain of human protein-2 tyrosine phosphatase shp-1
62 c3hizB_
not modelled
99.9
19
PDB header: transferase/oncoproteinChain: B: PDB Molecule: phosphatidylinositol 3-kinase regulatory subunit
PDBTitle: crystal structure of p110alpha h1047r mutant in complex with2 nish2 of p85alpha
63 d1a81e1
not modelled
99.9
26
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
64 c2hdxB_
not modelled
99.9
25
PDB header: signaling proteinChain: B: PDB Molecule: sh2-b ph domain containing signaling mediator 1
PDBTitle: crystal structure of the src homology-2 domain of sh2-b in2 complex with jak2 ptyr813 phosphopeptide
65 d2oq1a2
not modelled
99.9
26
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
66 c2ysxA_
not modelled
99.9
26
PDB header: signaling proteinChain: A: PDB Molecule: signaling inositol polyphosphate phosphatase
PDBTitle: solution structure of the human ship sh2 domain
67 d1qada_
not modelled
99.9
25
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
68 d3c7ia1
not modelled
99.9
24
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
69 c2fo0A_
not modelled
99.9
27
PDB header: transferaseChain: A: PDB Molecule: proto-oncogene tyrosine-protein kinase abl1 (1b isoform);
PDBTitle: organization of the sh3-sh2 unit in active and inactive forms of the2 c-abl tyrosine kinase
70 c2lqnA_
not modelled
99.9
24
PDB header: signaling proteinChain: A: PDB Molecule: crk-like protein;
PDBTitle: solution structure of crkl
71 c2eo6A_
not modelled
99.9
21
PDB header: signaling proteinChain: A: PDB Molecule: b-cell linker protein;
PDBTitle: solution structure of the sh2 domain from mouse b-cell2 linker protein blnk
72 c2crhA_
not modelled
99.9
21
PDB header: signaling proteinChain: A: PDB Molecule: vav proto-oncogene;
PDBTitle: solution structure of the sh2 domain of human proto-2 oncogene protein vav1
73 d1fhsa_
not modelled
99.9
22
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
74 c1ka6A_
not modelled
99.9
25
PDB header: immune systemChain: A: PDB Molecule: sh2 domain protein 1a;
PDBTitle: sap/sh2d1a bound to peptide n-py
75 c2ci8A_
not modelled
99.9
28
PDB header: translationChain: A: PDB Molecule: cytoplasmic protein nck1;
PDBTitle: sh2 domain of human nck1 adaptor protein - uncomplexed
76 d1ayaa_
not modelled
99.9
29
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
77 c2eobA_
not modelled
99.9
25
PDB header: hydrolaseChain: A: PDB Molecule: 1-phosphatidylinositol-4,5-bisphosphate
PDBTitle: solution structure of the second sh2 domain from rat plc2 gamma-2
78 d1a81a2
not modelled
99.9
26
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
79 d1a81e2
not modelled
99.9
28
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
80 c2dlyA_
not modelled
99.9
24
PDB header: transferaseChain: A: PDB Molecule: fyn-related kinase;
PDBTitle: solution structure of the sh2 domain of murine fyn-related2 kinase
81 d2izva2
not modelled
99.9
18
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
82 c2dlzA_
not modelled
99.9
25
PDB header: signaling proteinChain: A: PDB Molecule: protein vav-2;
PDBTitle: solution structure of the sh2 domain of human protein vav-2
83 d1d4ta_
not modelled
99.9
25
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
84 c2gsbA_
not modelled
99.9
24
PDB header: signaling proteinChain: A: PDB Molecule: ras gtpase-activating protein 1;
PDBTitle: solution structure of the second sh2 domain of human ras2 gtpase-activating protein 1
85 c1oplA_
not modelled
99.9
27
PDB header: transferaseChain: A: PDB Molecule: proto-oncogene tyrosine-protein kinase;
PDBTitle: structural basis for the auto-inhibition of c-abl tyrosine2 kinase
86 c2ablA_
not modelled
99.9
26
PDB header: transferaseChain: A: PDB Molecule: abl tyrosine kinase;
PDBTitle: sh3-sh2 domain fragment of human bcr-abl tyrosine kinase
87 d2shpa3
not modelled
99.9
39
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
88 d2qmsa1
not modelled
99.9
22
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
89 c2lctA_
not modelled
99.9
22
PDB header: signaling proteinChain: A: PDB Molecule: proto-oncogene vav;
PDBTitle: solution structure of the vav1 sh2 domain complexed with a syk-derived2 doubly phosphorylated peptide
90 d1blja_
not modelled
99.9
25
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
91 d1nrva_
not modelled
99.9
27
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
92 c2ge9A_
not modelled
99.9
23
PDB header: transferaseChain: A: PDB Molecule: tyrosine-protein kinase btk;
PDBTitle: solution structures of the sh2 domain of bruton's tyrosine2 kinase
93 d1r1qa_
not modelled
99.9
29
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
94 d1rjaa_
not modelled
99.9
26
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
95 c1k9aB_
not modelled
99.9
25
PDB header: transferaseChain: B: PDB Molecule: carboxyl-terminal src kinase;
PDBTitle: crystal structure analysis of full-length carboxyl-terminal2 src kinase at 2.5 a resolution
96 d1xa6a2
not modelled
99.9
25
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
97 d1lkka_
not modelled
99.9
23
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
98 c2augB_
not modelled
99.8
25
PDB header: signaling proteinChain: B: PDB Molecule: growth factor receptor-bound protein 14;
PDBTitle: crystal structure of the grb14 sh2 domain
99 c2eo3A_
not modelled
99.8
25
PDB header: signaling proteinChain: A: PDB Molecule: crk-like protein;
PDBTitle: solution structure of the sh2 domain from human crk-like2 protein
100 d1i3za_
not modelled
99.8
22
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
101 d1ohea2
not modelled
99.8
26
Fold: (Phosphotyrosine protein) phosphatases IISuperfamily: (Phosphotyrosine protein) phosphatases IIFamily: Dual specificity phosphatase-like
102 d1k9aa2
not modelled
99.8
27
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
103 d1opka2
not modelled
99.8
28
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
104 d1bkla_
not modelled
99.8
25
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
105 d1jyra_
not modelled
99.8
25
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
106 d1jwoa_
not modelled
99.8
27
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
107 c1y57A_
not modelled
99.8
23
PDB header: transferaseChain: A: PDB Molecule: proto-oncogene tyrosine-protein kinase src;
PDBTitle: structure of unphosphorylated c-src in complex with an inhibitor
108 d2eyva1
not modelled
99.8
30
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
109 c2hmhA_
not modelled
99.8
22
PDB header: cytokine regulatorChain: A: PDB Molecule: suppressor of cytokine signaling 3;
PDBTitle: crystal structure of socs3 in complex with gp130(ptyr757)2 phosphopeptide.
110 d1mila_
not modelled
99.8
31
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
111 d1csya_
not modelled
99.8
27
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
112 c3nhnA_
not modelled
99.8
21
PDB header: transferaseChain: A: PDB Molecule: tyrosine-protein kinase hck;
PDBTitle: crystal structure of the src-family kinase hck sh3-sh2-linker2 regulatory region
113 d1qcfa2
not modelled
99.8
27
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
114 c2vifA_
not modelled
99.8
21
PDB header: signaling proteinChain: A: PDB Molecule: suppressor of cytokine signalling 6;
PDBTitle: crystal structure of socs6 sh2 domain in complex with a c-kit2 phosphopeptide
115 d1luia_
not modelled
99.8
26
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
116 c2el8A_
not modelled
99.8
24
PDB header: signaling proteinChain: A: PDB Molecule: signal-transducing adaptor protein 2;
PDBTitle: solution structure of the human stap2 sh2 domain
117 c2knoA_
not modelled
99.8
18
PDB header: hydrolaseChain: A: PDB Molecule: tensin-like c1 domain-containing phosphatase;
PDBTitle: nmr solution structure of sh2 domain of the human tensin like c12 domain containing phosphatase (tenc1)
118 d1g83a2
not modelled
99.8
29
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain
119 c2c9wA_
not modelled
99.8
32
PDB header: transcription regulationChain: A: PDB Molecule: suppressor of cytokine signaling 2;
PDBTitle: crystal structure of socs-2 in complex with elongin-b and2 elongin-c at 1.9a resolution
120 d1f2fa_
not modelled
99.8
25
Fold: SH2-likeSuperfamily: SH2 domainFamily: SH2 domain