>4k2u_A|type: non-ab
GRNTSSNNEVLSNCREKRKGMKWDCKKKNDRSNYVCIPDRRIQLCIVNLSIIKTYTKETMKDHFIEASKKESQLLLKKNDNKYNSKFCNDLKNSFLDYGHLAMGNDMDFGGYSTKAENKIQEVFKGAHGEISEHKIKNFRKKWWNEFREKLWEAMLSEHKNNINNCKNIPQEELQITQWIKEWHGEFLLERDNRSKLPKSKCKNNTLYEACEKECIDPCMKYRDWIIRSKFEWHTLSKEYETQKVPKENAENYLIKISENKNDAKVSLLLNNCDAEYSKYCDCKHTTTLVKSVLNGN
>4k2u_B|type: non-ab
GRNTSSNNEVLSNCREKRKGMKWDCKKKNDRSNYVCIPDRRIQLCIVNLSIIKTYTKETMKDHFIEASKKESQLLLKKNDNKYNSKFCNDLKNSFLDYGHLAMGNDMDFGGYSTKAENKIQEVFKGAHGEISEHKIKNFRKKWWNEFREKLWEAMLSEHKNNINNCKNIPQEELQITQWIKEWHGEFLLERDNRSKLPKSKCKNNTLYEACEKECIDPCMKYRDWIIRSKFEWHTLSKEYETQKVPKENAENYLIKISENKNDAKVSLLLNNCDAEYSKYCDCKHTTTLVKSVLNGN
>4k2u_I|type: H
EVQLQQSGAELVKPGASVKLSCTASGFNIKDNYMHWVKQRPEQGLEWIGRIDPANGNTKYDPKFQGKATITADTSSNTAYLQLSSLTSEDTAVYYCARHYDGYFLYYFEYWGQGTTLTVSSAKTTPPSVYPLAPGSAAQTNSMVTLGCLVKGYFPEPVTVTWNSGSLSSGVHTFPAVLQSDLYTLSSSVTVPSSTWPSETVTCNVAHPASSTKVDKKIVPRDCGCKPCICTVP
>4k2u_H|type: H
EVQLQQSGAELVKPGASVKLSCTASGFNIKDNYMHWVKQRPEQGLEWIGRIDPANGNTKYDPKFQGKATITADTSSNTAYLQLSSLTSEDTAVYYCARHYDGYFLYYFEYWGQGTTLTVSSAKTTPPSVYPLAPGSAAQTNSMVTLGCLVKGYFPEPVTVTWNSGSLSSGVHTFPAVLQSDLYTLSSSVTVPSSTWPSETVTCNVAHPASSTKVDKKIVPRDCGCKPCICTVP
>4k2u_M|type: L
LSLDMMSSAQFLGLLLLCFQGTRCDIQMTQTTSSLSASLGDRVTITCRAGQDISNYLNWYQQKPDGTVKLLIYYTSRLHSGVPSRFSGSGSGTDYSLTISNLEQEDIATYFCQQGSTFPWTFGGGTKLEIKRADAAPTVSIFPPSSEQLTSGGASVVCFLNNFYPKDINVKWKIDGSERQNGVLNSWTDQDSKDSTYSMSSTLTLTKDEYERHNSYTCEATHKKGEFQHTGGRY
>4k2u_L|type: L
LSLDMMSSAQFLGLLLLCFQGTRCDIQMTQTTSSLSASLGDRVTITCRAGQDISNYLNWYQQKPDGTVKLLIYYTSRLHSGVPSRFSGSGSGTDYSLTISNLEQEDIATYFCQQGSTFPWTFGGGTKLEIKRADAAPTVSIFPPSSEQLTSGGASVVCFLNNFYPKDINVKWKIDGSERQNGVLNSWTDQDSKDSTYSMSSTLTLTKDEYERHNSYTCEATHKKGEFQHTGGRY
