>4X2V_1|Chains A, B, C, D|NS6 Protease|Murine norovirus 1 (223997) SAPVSIWSRVVQFGTGWGFWVSGHVFITAKHVAPPKGTEIFGRKPGDFTVTSSGDFLKYYFTSAVRPDIPAMVLENGCQEGVVASVLVKRASGEMLALAVRMGSQAAIKIGSAVVHGQTGMLLTGSNAKAQDLGTIPGDAGCPYVYKKGNTWVVIGVHVAATRSGNTVIAATHGEPTLEALEFQG >4X2V_2|Chain E|NS6 Protease|Murine norovirus 1 (223997) LEFQG >4X2V_3|Chain F|NS6 Protease|Murine norovirus 1 (223997) XXXXXXX