title: The structure and biosynthesis of porphyran: a comparison of some samples.
mesh_terms: D011134:Polysaccharides / Q000737:chemistry*; D012685:Sepharose / Q000031:analogs & derivatives
chemical_list: D011134:Polysaccharides; C038549:porphyran; D012685:Sepharose
keywords: POLYSACCHARIDES/chemistry