SRM GI:63253298 spermidine synthase 1 mepgpdgpaa sgpaairegw fretcslwpg qalslqveql lhhrrsryqd 50 51 ilvfrsktyg nvlvldgviq cterdefsyq emianlplcs hpnprkvlii 100 101 gggdggvlre vvkhpsvesv vqceidedvi qvskkflpgm aigysssklt 150 151 lhvgdgfefm kqnqdafdvi itdssdpmgp aeslfkesyy qlmktalked 200 201 gvlccqgecq wlhldlikem rqfcqslfpv vayayctipt ypsgqigfml 250 251 csknpstnfq epvqpltqqq vaqmqlkyyn sdvhraafvl pefarkalnd 300 301 vs