Amino acid composition in Isoparorchis hypselobagri.

The free amino acids of Isoparorchis hypselobagri have been determined by the chromatographic method (two-dimensional ascending). These are: leucine, valine, proline, alanine, glycine, glutamic acid and aspartic acid.     

Amino acid composition and protein dimension

There is indirect evidence that the amino acid composition of proteins depends on their dimension. The amino acid composition of a nonredundant set of about 550,000 proteins was determined and it was observed that, in the range of 50-200 residues, the percentage of occurrence of most of the residue types significantly depends on protein dimension. This result should prove useful in analyzing protein sequences and genomics.     

Amino acid composition of peptidoglycan in Caulobacter crescentus.

Peptidoglycan of a gram-negative stalked bacterium, Caulobacter crescentus CB13, contained alanine, diaminopimelic acid, and glutamic acid, in molar ratios of 2 : 1 : 1. The amino acid compositions of peptidoglycans isolated from cultures enriched in swarmer and stalked cells, and from a stalk-less mutant were similar. This finding conflicts with a previous observation that swarmer peptidoglycan does not contain diaminopimelic acid (Goodwin and Shedlarski (1975) Arch. Biochem. Biophys. 170, 23-36). It appears that, despite the morphological differences, the Caulobacter cells all contain a similar peptidoglycan in the cell wall.     

Amino acid composition of triticale gluten

The study of the amino acid composition of tritikale gluten has demonstrated that in comparison with that of grain protein it contains much less aspartic acid (by 28.1%) and lysine (by 19.4%), less alanine and arginine but more tyrosine (by 39.7%), glutamic acid (by 31.4%), phenylalanine (by 23.6%) and leucine (by 14.4%) and slightly more threonine and valine. The study has shown no significant differences in the amino acid composition of grain protein and tritikale gluten of different varieties and cultivation regions.