Conformational Properties of the Amino Acid Residues L-Cysteine, L-Serine and L-Cystine.

The fermentation of L-threonine, L-serine, L-cysteine and acrylic acid by a gram-negative coccus.

Overproduction of L-cysteine and L-cystine by Escherichia coli strains with a genetically altered serine acetyltransferase.

Organisms that overproduced L-cysteine and L-cystine from glucose were constructed by using Escherichia coli K-12 strains. cysE genes coding for altered serine acetyltransferase, which was genetically desensitized to feedback inhibition by L-cysteine, were constructed by replacing the methionine residue at position 256 of the serine acetyltransferase protein with 19 other amino acid residues or...

The Effect of Pressure, and Formation of new Polymorphs of the Amino Acids L-cysteine and L-serine

With the notable exceptions of water, ammonia and a very limited number of other examples, there have been relatively few highpressure structural studies of simple molecular compounds. Such studies can provide fascinating information about intermolecular interactions and pressure-induced phase transition, in particular hydrogen-bonding interactions. Recent results for thiourea and urea obtained...

Studies on analogues of L-cysteine and L-cystine. III. The effect of selenium cystine on leukemia.

-CYSTEINE and related (omnpoumsds appear to have au importatit uole in the rnetabolismn of leukocytes. 6 A decrease its the availability of L-cyst-eine or L_cystimie* may therefore have important effects ots beukocyt-es. The Icukocytes of acute leukemia amid chromuic myeloid beukemia exhibit a niore rapid turmiover of radioactive L-cystiise thams do normnal leukocytes.7’ 8 Leukensic leukocytes ...

Studies on analogues of L-cysteine and L-cystine. I. Some structural requirements for inhibiting the incorporation of radioactive L-cystine by leukemic leukocytes.