علوم کشاورزی (کب)

... > LIFE SCIENCES > biology > biochemistry > biochemistry by substance > biochemical substances by composition or structure > proteins, peptides and amino acids > peptides > peptides by chain length > oligopeptides > tetragastrin

... > PHYSICAL SCIENCES > chemistry > chemical substances > chemical substances by use or effect > drugs > drugs by function > gastrointestinal agents > tetragastrin