k5 HyHEL10 light chain transgenic k5 transgene insertion 5, Jason G Cyster k5 HyHel10|k5|k5 HyHEL10 light chain transgenic k5 HyHel10 O Tg(Igk)5Cys MGI:3702698 transgene Transgene http://identifiers.org/mgd/MGI:3702698