Immunogen sequence: LLNGYETLED LKDIKESHLI ELNIENPDDR RRLLSAAENF LEEEIIQEQE NEPEPLSLSS DISLNKSQLD DCPRDSGCYI SSGNSDNGKE DLESENLSDM VHKIIITEPS. SAMSN (HACS1) is a member of a novel gene family of putative adaptors and scaffold proteins containing SH3 and S