Search PubMed⌕ Search

Biomedical subjects

J Williams

Publications and source records attributed to J Williams.

At least 1,171 records · Page 65Linked to original sources
PubMed1971

The cross-linking of tyrosine by treatment with tetranitromethane.

1. Tyrosine was treated with tetranitromethane. 2. Approx. 10% of the tyrosine was converted into 3-nitrotyrosine. 3. Three fluorescent compounds were also formed. They appear to be a dimer, trimer and tetramer in which tyrosine units are linked by biphenyl bonds. 4. The dimer and trimer have also been isolated from some proteins after treatment with tetranitromethane. 5. The yield of 3-nitrotyrosine from ovotransferrin after treatment with tetranitromethane was much smaller than the loss of tyrosine. 6. Several unidentified compounds were also formed by the reaction between tyrosine and tetranitromethane.

Electrophoresis↗
PubMed1970

The amino acid sequences of cysteic acid-containing peptides from performic acid-oxidized ovotransferrin.

1. The half-cystine content of ovotransferrin, measured as cysteic acid, was 31mol/80000g of protein. 2. The amino acid sequences of cysteic acid-containing peptides from performic acid-oxidized ovotransferrin were studied. 3. 34 unique cysteic acid residues were identified. 4. It is concluded that hen ovotransferrin does not consist of two identical halves or subunits.

Amino Acid Sequence↗