"14978887-n"^^ . . . . . . . . . . "0"^^ . . . "precursor of pepsin; stored in the stomach walls and converted to pepsin by hydrochloric acid in the stomach"@en-us . "pepsinogen"^^ . "114978887"^^ . . "114128210"@en-us . "pepsinogen"@en-us . "0"^^ .