The Extracellular Polysaccharide of a Methylotrophic Culture

The constituent sugars of the extracellular polysaccharide produced by an enrichment culture, growing on methane as sole carbon source, were identified as glucose, galactose, mannose, fucose and rhamnose, in the approximate molar ratios of 1·00: o· 36: 0·19 : O· 31 : 0·16. When the culture was grown on methanol as sole carbon source, only glucose, galactose and mannose, in the approximate molar ratios of 1 ·00 : 0·67 : 0·42, were identified as components of the extracellular polysaccharide.