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Biomedical subjects

B T Pickering

Publications and source records attributed to B T Pickering.

70 records · Page 4Linked to original sources
PubMed1971

Tentative identification of a vasopressin-neurophysin and an oxytocin-neurophysin in the rat.

1. Rat neurohypophysial extracts have been examined by polyacrylamide-gel electrophoresis. 2. Three of the proteins were tentatively identified as neurophysins by their acidic nature and their disappearance after dehydration of the animals. 3. These proteins were radioactive 24h after intracisternal injection of [(35)S]cysteine. 4. Two of the proteins were present in much greater quantities than the third, and these two were present in the gland in the same ratio as the hormones vasopressin and oxytocin. 5. One of these proteins was absent from glands of rats homozygous for diabetes insipidus but present in heterozygous animals. 6. It is suggested that these two proteins are the vasopressin-neurophysin and oxytocin-neurophysin of the rat.

Animals↗
PubMed1969

Comparison of the effects of water deprivation and sodium chloride imbibition on the hormone content of the neurohypophysis of the rat.

1. Vasopressin and oxytocin have been measured in the neurohypophysis of rats which had either been given a 2% (w/v) NaCl solution to drink or been deprived of drinking water for up to 5 days.2. There was a progressive decrease in the vasopressin content of the glands in both groups; the rates of depletion were not significantly different.3. Oxytocin also decreased progressively in both groups but the glands from the ;saline-treated' rats contained less hormone than those from the ;water-deprived' animals.4. The differences in gland content of oxytocin could not be correlated with differences between the plasma osmolalities or sodium concentrations of the two groups.

Animals↗
PubMed1966

Components of the cell wall of Clostridium welchii (type A).

1. The cell wall of Clostridium welchii (type A) contains alanine, 2,6-diaminopimelic acid, glutamic acid, glycine, glucosamine, muramic acid, galactosamine, mannosamine, ethanolamine, rhamnose, galactose and phosphorus. 2. Heating with formamide at 150 degrees resolved the wall into a formamide-soluble polysaccharide fraction and a formamide-insoluble mucopeptide fraction. 3. The formamide-soluble fraction contained two components: an electrophoretically neutral polysaccharide made up of galactose, rhamnose, galactosamine and phosphorus and an electrophoretically acidic polymer containing mannosamine, ethanolamine and phosphorus. 4. The formamide-insoluble residue has been digested by lysozyme to give soluble fragments of high molecular weight. 5. All fractions contain an unknown ethyl acetate-extractable substance that can be oxidized by sodium metaperiodate. 6. The amino acid compositions of the fragments produced by lysozyme are compatible with a mucopeptide structure which has cross bridges containing all of the constituent amino acids.

Amino Acids↗