>gi|19882251 cystatin SN precursor [Homo sapiens]
MAQYLSTLLLLLATLAVALAWSPKEEDRIIPGGIYNADLNDEWVQRALHF
AISEYNKATKDDYYRRPLRVLRARQQTVGGVNYFFDVEVGRTICTKSQPN
LDTCAFHEQPELQKKQLCSFEIYEVPWENRRSLVKSRCQES