. . . . . . . . . "21"^^ . . "21"^^ . . "N6-crotonyllysine; alternate modification of amino acid 21 of NX_P62807-1" . . . . . . . "neXtProt gold" . . "10.1016/j.cell.2011.08.008" . . . . . . "2014-09-19T00:00:00.0Z"^^ . . . "neXtProt database" . "CALIPHO project" . . . . . "4" . . .