IL21 GI:11141875 interleukin 21 1 mrsspgnmer iviclmvifl gtlvhksssq gqdrhmirmr qlidivdqlk 50 51 nyvndlvpef lpapedvetn cewsafscfq kaqlksantg nneriinvsi 100 101 kklkrkppst nagrrqkhrl tcpscdsyek kppkeflerf ksllqkmihq 150 151 hlssrthgse ds