>1u3h_H mol:protein length:189 H-2 class II histocompatibility antigen, A-U beta chain GDSERHFVVQFQPFCYFTNGTQRIRYVTRYIYNREEYLRFDSDVGEYRAVTELGRPDAE YYNKQYLERTRAELDTVCRYNYEETEVPTSLRRLEQPNVVISLSRTEALNHHNTLVCSV TDFYPAKIKVRWFRNGQEETVGVSSTQLIRNGDWTFQVLVMLEMTPRRGEVYTCHVEHP SLKSPITVEWRA