Incorporation of Proline and Aromatic Amino Acids into Cell Walls of Maize Coleoptiles

摘要: Sections excised from maize coleoptiles incorporated radioactivity proline, tyrosine, and phenylalanine into structural components of the cell wall. Only about 2% proline taken up by sections was wall; 24% that in hydroxyproline rest remained proline. In contrast, as much 40% 30% tyrosine wall material. Most this saponifiable ferulic acid. Small amounts p-coumaric diferulic acid were found, but only a small fraction hemicellulose can possibly be immobilized directly through cross-linking esters. Substantial aromatic amino acids insoluble after strong alkali extractions material, large polysaccharide solubilized dilute following oxidation phenolics acidic NaClO2. Hence, hemicellulosic material walls may organized cross-linked primarily alkali-resistant etherified aromatics.