Performance, plasma hormones, histochemical and biochemical muscle traits, and meat quality of pigs administered exogenous somatotropin between 30 and 60 kilograms and 100 kilograms body weight
Article Abstract:
An experiment was conducted on the effects of exogenous porcine somatotropin (pST) on 30-kilogram and 60-kilogram barrows as compared to 100-kilogram pigs. Results show that giving daily pST between 30 and 100 kilograms body weight produced a decrease in feed:gain ratio and backfat as compared with 60 to 100 kilograms. It was also shown that muscle weight did not increase nor was pH affected with administration of pST. An increase was observed in the diameter of both red and white muscle fibers and pigs treated from 30 kilograms showed faster contractile type and metabolic characteristics.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
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Partial purification of somatotropin receptors from pig liver: they arise from a single somatotropin receptor messenger RNA transcript
Article Abstract:
Somatotropin receptors (ST-R) in pig livers were studied to determine its size and the number of ST-R forms present in liver microsomal membranes. Gel electrophoresis and affinity chromatography studies show two specific proteins of 107 and 40 kDa that were found to come from posttranslational modification of one 4.2 kilobase somatotropin receptor messenger ribonucleic acid transcript. The predominating isoform present in liver membranes were the smaller proteins derived from the 107-kDa protein.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
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Characterization of somatotropin binding sites in pig skeletal muscle
Article Abstract:
Somatotropin (ST) binding sites in pig skeletal muscle was characterized using bovine ST and sarcolemmal preparations. Scatchard analysis showed a single class of binding sites for ST, which is temperature and time-dependent and stable at a certain pH range. Optimal specific binding conditions include temperature of 23 degrees Celsius for 48 hours at pH 5.5 to 8.5. These binding sites are specific for ST and has poor interaction with porcine prolactin.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
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