Topic:Biology
The study of biology in horses encompasses the examination of their physiological, genetic, and cellular processes. This field investigates the anatomical structures, reproductive biology, and genetic makeup of horses, offering insights into their growth, development, and adaptation. Researchers focus on various aspects such as equine genetics, which explores hereditary traits and genetic disorders, and equine physiology, which examines the functions of different systems within the horse's body, including the cardiovascular, respiratory, and musculoskeletal systems. This page assembles peer-reviewed research studies and scholarly articles that explore the biological mechanisms and processes in horses, providing a comprehensive understanding of their biological functions and health.
Identification of the lysine residue modified during the activation of acetimidylation of horse liver alcohol dehydrogenase. A single amino group in horse liver alcohol dehydrogenase was modified with methyl(14C)acetimidate by a differential labeling procedure. Lysine residues outside the active site were modified with ethyl acetimidate while a lysine residue in the active site was protected by the formation of an enzyme-NAD+-pyrazole complex. After the protecting reagents were removed, the enzyme was treated with methyl(14C)acetimidate. Enzyme activity was enhanced 13-fold as 1.1 (14C)acetimidyl group was incorporated per active site. A labeled peptide was isolated from a tryptic-chymotryptic digest of the modified...
The effect of gonadotrophins on fluid secretion and sperm production by the rat and hamster testis. Single intravenous injections of ovine luteinizing hormone (LH) in adult hamsters and rats had no effect on fluid secretion by the testes, as measured by the gain in weight or water content during a 10-h period after ligation of the efferent ducts (EDL). Neither was there any obvious effect on the liberation of spermatozoa, as judged by the total number of sperm in the unligated and EDL testes and from the concentration of spermatozoa in the secreted fluid, calculated from the difference between the number of sperm in the EDL and unligated testes divided by the difference in weight.
In adul...