PPA2 GI:77812682 inorganic pyrophosphatase 2 isoform 4 precursor 1 msallrllrt gapaaaclrl gtsagtgsrr amalyhteer gqpcsqnyrl 50 51 ffniddvkkf kpgyleatln wfrlykvpdg kpenqfafng efknkafale 100 101 viksthqcwk allmkkcngg ainctnvqis dspfrctqee arslvesvss 150 151 spnkesneee qvwhflgk