>3U53_1|Chains A, B, C, D|Bis(5'-nucleosyl)-tetraphosphatase [asymmetrical]|Homo sapiens (9606) MALRACGLIIFRRCLIPKVDNNAIEFLLLQASDGIHHWTPPKGHVEPGEDDLETALRETQEEAGIEAGQLTIIEGFKRELNYVARNKPKTVIYWLAEVKDYDVEIRLSHEHQAYRWLGLEEACQLAQFKEMKAALQEGHQFLCSIEALEHHHHHH