Как выбрать гостиницу для кошек
14 декабря, 2021
The organization of walls can be described as consisting of cellulosic microfibrils and structural proteins inserted into and reinforcing a multicomponent gel matrix, composed of stereo-irregular, non-cellulosic heteropolysaccharides (heteroglucans, heteromannans, het — eroxylans, (1^3,1^4)-p-D-glucans, and pectins). In primary walls these matrix polysaccharides may interact through physical associations with one another and the cellulosic microfibrils and also through covalent associations. In secondary walls the matrix polysaccharides also interact covalently with non-carbohydrate wall components such as lignins, suberin, cutin, cutan, and proteins. The following sections describe the nature of both non-covalent and covalent associations between wall polymers.