CST3 GI:4503107 cystatin C precursor 1 magplrapll llailavala vspaagsspg kpprlvggpm dasveeegvr 50 51 raldfavgey nkasndmyhs ralqvvrark qivagvnyfl dvelgrttct 100 101 ktqpnldncp fhdqphlkrk afcsfqiyav pwqgtmtlsk stcqda