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Biomedical subjects

L Glaser

Publications and source records attributed to L Glaser.

At least 127 records · Page 7Linked to original sources
PubMed1974

Temporal changes in embryonal cell surface recognition.

Plasma membranes have been prepared from optic tectum and neural retina of chick embryos. These membranes specifically inhibit the aggregation of homotypic cells. Plasma membranes prepared from each of these regions obtained from chick embryos at 7,8, and 9 days of development show specificity for homotypic cells of the same age and cross-react weakly with homotypic cells of different ages. Thus cell-surface recognition changes with age of development, and most of the cells in each region have a common cell-surface recognition specificity. Tectal cells react weakly with retinal cell membranes, but no inhibition of retinal cell aggregation by tectal cells has been noted.

Animals↗
PubMed1973

Specific recognition of plasma membranes by embryonic cells.

Methods have been developed for preparation of plasma membrane fractions from embryonic neural retina and cerebellum. These membrane fractions are specifically bound by intact cells of the original tissue (homotypic binding) and not by cells from the other tissue (heterotypic binding). Aggregation of neural retina cells and cerebellar cells is prevented by addition of homotypic membranes but not by heterotypic membranes. We conclude that, under our assay conditions, these embryonic cells specifically recognize homotypic membranes, and that the specificity of recognition is the same as in the initial step in the process of cellular aggregation.

Adenosine Triphosphatases↗
PubMed1972

An acceptor-dependent polyglycerolphosphate polymerase.

A method for the extraction of polyglycerolphosphate polymerase from Bacillus subtilis membranes is described. Further purification by ion-exchange chromatography yields an enzyme fraction totally dependent on the addition of a heat-stable factor for activity. This factor was isolated from cell membranes and acts as an acceptor of glycerolphosphate units. The acceptor contains glycerolphosphate, glucosamine, and fatty acids, but its precise chemical structure has not yet been elucidated.

Bacillus subtilis↗
PubMed1972

Mode of cell wall growth of Bacillus megaterium.

The growth of the cell wall of Bacillus megaterium KM was examined by labeling the cell wall uniformly with (3)H-alpha, epsilon-diaminopimelic acid and examining by radioautography the distribution of labeled cell wall material in daughter cells. The results indicate that the label is distributed uniformly to all daughter cells and rule out a single growth point, either central or apical, for these cells. The results strongly suggest that cell wall growth occurs by uniform deposition of new wall over the whole cell surface.

Autoradiography↗