>sp|A4FU49-4|SH321_HUMAN SH3 domain-containing protein 21 OS=Homo sapiens GN=SH3D21 MIKEIEDGWWLGKRNGQLGAFPSNFVELLDSGPPSLGNPDMPSVSPGPQRPPKTTEDKGW WEGECQGRRGVFPDNFVLPPPPIKKLVPRKVVSRESAPIKEPKKLMPKTSLPTVKKLATA TTGPSKAKRKSTAAR