TFF2 GI:4885629 trefoil factor 2 precursor 1 mgrrdaqlla allvlglcal agsekpspcq csrlsphnrt ncgfpgitsd 50 51 qcfdngccfd ssvtgvpwcf hplpkqesdq cvmevsdrrn cgypgispee 100 101 casrkccfsn fifevpwcff pksvedchy