1. Insoluble polypeptide formed through the random condensation of amino acids or peptides under the catalytic influence of a proteinase-like chymotrypsin; molecular weights as high as 500,000 are reported.
2. A gel that is formed on treating a partial hydrolysate of a protein with an endopeptidase.
A massive polypeptide formed by the hydrolysis of proteins and the subsequent recombination of amino acid esters. Plasteins can be derived from nonconventional sources of protein (e.g., cassava leaves or other plants) and used to make protein-rich foods.