PROK2 GI:17530787 prokineticin 2 isoform b precursor 1 mrslccapll lllllpplll tpragdaavi tgacdkdsqc gggmccavsi 50 51 wvksirictp mgklgdschp ltrkvpffgr rmhhtcpclp glaclrtsfn 100 101 rficlaqk