ASIP GI:21327680 agouti signaling protein precursor 1 mdvtrlllat llvflcffta nshlppeekl rddrslrsns svnlldvpsv 50 51 sivalnkksk qigrkaaekk rsskkeasmk kvvrprtpls apcvatrnsc 100 101 kppapaccdp cascqcrffr sacscrvlsl nc