THE CHEMICAL COMPOSITION OF THE CELL WALL OF CHLAMYDOMONAS GYMNOGAMA AND THE CONCEPT OF A PLANT CELL WALL PROTEIN |
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| Authors: | David H Miller Ira Seth Mellman Derek T A Lamport and Maureen Miller |
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| Institution: | From the Department of Biology, Oberlin College, Oberlin, Ohio 44074 and the MSU/AEC Plant Research Laboratory, East Lansing, Michigan 48823. |
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| Abstract: | Cell walls of Chlamydomonas gymnogama, shed during sexual mating, were collected and analyzed. Ultrastructural examination indicates that the walls are free of cytoplasmic contamination and that they exhibit a regular lamellate structure. The walls are composed of glycoprotein rich in hydroxyproline. The hydroxyproline is linked glycosidically to a mixture of heterooligosaccharides composed of arabinose and galactose. Altogether, the glycoprotein complex accounts for at least 32% of the wall. The amino acid composition of the walls is extraordinarily similar in widely different plant species. The implications of these similarities as well as the widespread occurrence of these glycoproteins are discussed. |
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