PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 16815335-4 2006 We find that both PSD-95 and SAP97 contain alternative N termini expressing either double cysteines that normally are palmitoylated (alpha-isoforms) or an L27 domain (beta-isoforms). Cysteine 90-99 discs large MAGUK scaffold protein 4 Homo sapiens 18-24