>1j8h_B mol:protein length:192 HLA CLASS II HISTOCOMPATIBILITY ANTIGEN, DR-4 BETA CHAIN GDTRPRFLEQVKHECHFFNGTERVRFLDRYFYHQEEYVRFDSDVGEYRAVTELGRPDAE YWNSQKDLLEQKRAAVDTYCRHNYGVGESFTVQRRVYPEVTVYPAKTQPLQHHNLLVCS VNGFYPGSIEVRWFRNGQEEKTGVVSTGLIQNGDWTFQTLVMLETVPRSGEVYTCQVEH PSVTSPLTVEWRARS