The highly pathogenic bacterium clostridium perfringens causes gangrene, a disease that results in the destruction of animal tissue. the bacterium secretes two types of collagenases that cleave the peptide bonds linking gly and pro residues. a biochemical company sells a partially purified preparation of these collagenases to investigators who are interested in culturing cells deived from bone, cartilate, muscle, or endothelial tissue. how does this enzyme preparation assist the investigator in obtaining cells for culturing?
an enzyme found in tadpoles cleaves the peptide bond indicated in the figure below. what protein might contain this sequence and what is the role of this cleavage in the metamorphosis of the tadpole to the adult frog?
gly-pro-gln-ile-ala