Abnormal gamma-glutamylcysteine synthetase activities in sheep red blood cells. 1983

E M Tucker, and L Kilgour, and C Crowley, and J D Young

Red blood cell gamma-glutamylcysteine synthetase (GC-S) activities and glutathione (GSH) concentrations were investigated in pure-bred Finnish Landrace, Tasmanian Merino, and Finnish Landrace X Tasmanian Merino sheep. Previous studies were confirmed that a dominant gene (L) at the GSH locus leads to partial GC-S and GSH deficiency, while a recessive gene (h) at the Tr locus codes for defective red cell amino acid transport, concomitant GSH deficiency, and significantly elevated levels of GC-S. In addition, new results are presented which suggest that there is a dominant gene (A) at another locus distinct from GSH and Tr (provisionally designated GC-S) which has a marked epistatic enhancing effect on measured GC-S activities.

UI MeSH Term Description Entries
D008297 Male Males
D010453 Peptide Synthases Ligases that catalyze the joining of adjacent AMINO ACIDS by the formation of carbon-nitrogen bonds between their carboxylic acid groups and amine groups. Peptide Synthetases,Acid-Amino-Acid Ligases,Acid Amino Acid Ligases,Ligases, Acid-Amino-Acid,Synthases, Peptide,Synthetases, Peptide
D010641 Phenotype The outward appearance of the individual. It is the product of interactions between genes, and between the GENOTYPE and the environment. Phenotypes
D003433 Crosses, Genetic Deliberate breeding of two different individuals that results in offspring that carry part of the genetic material of each parent. The parent organisms must be genetically compatible and may be from different varieties or closely related species. Cross, Genetic,Genetic Cross,Genetic Crosses
D004912 Erythrocytes Red blood cells. Mature erythrocytes are non-nucleated, biconcave disks containing HEMOGLOBIN whose function is to transport OXYGEN. Blood Cells, Red,Blood Corpuscles, Red,Red Blood Cells,Red Blood Corpuscles,Blood Cell, Red,Blood Corpuscle, Red,Erythrocyte,Red Blood Cell,Red Blood Corpuscle
D005260 Female Females
D005721 Glutamate-Cysteine Ligase One of the enzymes active in the gamma-glutamyl cycle. It catalyzes the synthesis of gamma-glutamylcysteine from glutamate and cysteine in the presence of ATP with the formation of ADP and orthophosphate. EC 6.3.2.2. gamma-Glutamyl-Cysteine Synthetase,Glutamylcysteine Synthetase,Glutamate Cysteine Ligase,Ligase, Glutamate-Cysteine,Synthetase, Glutamylcysteine,Synthetase, gamma-Glutamyl-Cysteine,gamma Glutamyl Cysteine Synthetase
D005796 Genes A category of nucleic acid sequences that function as units of heredity and which code for the basic instructions for the development, reproduction, and maintenance of organisms. Cistron,Gene,Genetic Materials,Cistrons,Genetic Material,Material, Genetic,Materials, Genetic
D005799 Genes, Dominant Genes that influence the PHENOTYPE both in the homozygous and the heterozygous state. Conditions, Dominant Genetic,Dominant Genetic Conditions,Genetic Conditions, Dominant,Condition, Dominant Genetic,Dominant Gene,Dominant Genes,Dominant Genetic Condition,Gene, Dominant,Genetic Condition, Dominant
D005808 Genes, Recessive Genes that influence the PHENOTYPE only in the homozygous state. Conditions, Recessive Genetic,Genetic Conditions, Recessive,Recessive Genetic Conditions,Condition, Recessive Genetic,Gene, Recessive,Genetic Condition, Recessive,Recessive Gene,Recessive Genes,Recessive Genetic Condition

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