Immunogen sequence: TVSKGGRGPG SQHTKEAEDK IPLVPSKVSV IKGSRSQKEA FPLAKGEVDT APQGNKDLKE HVLQSSLSQE HKDP Antigen sequence identity: Mouse 70%; Rat 69%. Substrate of the antigen receptor-coupled tyrosine kinase. Plays a role in antigen receptor signaling for