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PubMed1985

Conformational disorder of the distal leucine in monomeric Glycera hemoglobins and implications for oxygen binding.

1H NMR studies of the carbon monoxide complexes of the major monomeric hemoglobins from Glycera dibranchiata show that distal leucine is conserved at position E7. The observed ring current shifts and nuclear Overhauser enhancements indicate conformational disorder of the leucine E7 side chain. The conformational substates interconvert rapidly on the NMR time scale. The rapid conformational fluctuations of leucine E7 may play a fundamental role in governing diffusion of ligands to the heme.

Animals↗
PubMed1991

Isolation and characterization of methylated sugars from the tube of the hydrothermal vent tubiculous annelid worm Alvinella pompejana.

The tube of Alvinella pompejana contains in its carbohydrate fraction, 3 methylated monosaccharides: 2-mono-O-methyl-L-fucose, 3-mono-O-methyl-L-fucose and 2,4-di-O-methyl-L-fucose. The present work appears to be the first report of the occurrence of 2-mono-O-methyl-L-fucose and 3-mono-O-methyl-L-fucose in the animal kingdom. Moreover, it is the first time that 2,4-di-O-methyl-L-fucose is found in nature.

Animals↗