Matching Pairs ProteinsOnline version proteins part 1 by Danielle Woods 1 how many nonessential amino acids? 2 secondary structure 3 how many essential amino acids? 4 peptide bonds 5 protein absorption 6 denaturation of protein 7 protein digestion in stomach 8 quaternary structure 9 primary structure 10 protein digestion in small intestine 11 tertiary structure 12 basic structure of amino acid proteases released by pancreas, breaking down polypeptides to dipeptides and tripeptides, which are further broken down into amino acids two or more polypeptide chains bond together eleven unfolding of proteins occurring in presence of heat, acid, base, salt, or mechanical agitation 3D globular shape, folding of polypeptide chain slightly folded and twisted gastrin releases HCl, HCl denatures proteins and converts pepsinogen to pepsin nine absorbed in small intestine, transported to liver from intestines via portal vein amine group, R group (side chain), carboxyl group, hydrogen join 2 amino acids together single peptide chain, simple linear chain