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Biomedical subjects

W A Lindner

Publications and source records attributed to W A Lindner.

4 recordsLinked to original sources
PubMed1986

Lactose and melibiose metabolism in Erwinia chrysanthemi.

A Lac+ mutant of Erwinia chrysanthemi was isolated from the Lac- wild type on lactose agar. beta-Galactosidase was expressed independently of lactose transport in both the mutant and the wild type, and neither strain expressed thiogalactoside transacetylase. Lactose transport and alpha-galactosidase, constitutive in the Lac+ strain, were coordinately induced in the Lac- strain by melibiose and raffinose but not by isopropyl-beta-D-thiogalactopyranoside or thiomethyl-beta-D-galactopyranoside. Melibiose was a strong inhibitor of both the melibiose- and the raffinose-induced lactose permeases, whereas raffinose was a strong inhibitor of only the raffinose-induced lactose permease.

Acetyltransferases↗
PubMed1977

Sodium dependence and counterflow of some amino acids in chick intestine.

By incubating chicken intestinal rings in buffer containing either sodium or mannitol, it was demonstrated that uptake of L-lysine and L-histidine is sodium dependent. Double reciprocal plots of the data indicated that Vmax was independent of sodium concentration. KM values, however, were increased considerably in the absence of the metal, indicating a decreased affinity of the amino acid for a hypothetical carrier. A failure to demonstrate mobile carriers for L-lysine and L-arginine in chick intestine is reported. Counterflow results are briefly discussed in terms of fixed binding sites.

Amino Acids↗