SSPN GI:209529678 sarcospan isoform 2 1 mlcvsyqvde rtciqfsmkl lyfllsalgl tvcvlavafa ahhysqltqf 50 51 tcettldscq cklpssepls rtfvyrdvtd ctsvtgtfkl flliqmilnl 100 101 vcglvcllac fvmwkhryqv fyvgvricsl tasegpqqki