>2pxy_D mol:protein length:189 H-2 class II histocompatibility antigen, A-U beta chain DSERHFVVQFQPFCYFTNGTQRIRYVTRYIYNREEYLRFDSDVGEYRAVTELGRPDAEY YNKQYLERTRAELDTVCRYNYEETEVPTSLRRLEQPNVVISLSRTEALNHHNTLVCSVT DFYPAKIKVRWFRNGQEETVGVSSTQLIRNGDWTFQVLVMLEMTPRRGEVYTCHVEHPS LKSPITVEWRAQ