protein coding gene http://identifiers.org/mgd/MGI:101780 Spi4 O Serpine2 PN-1 nexin PI7 - Gene B230326M24Rik|Spi4|PN-1|nexin|protease nexin 1|PI7 genetic mapping protease nexin 1 MGI:101780 B230326M24Rik serine (or cysteine) peptidase inhibitor, clade E, member 2