Changes in breast muscle composition in the young chick
- Iñarrea, P. 1
- González, J. 1
- Andrades, M.S. 1
- Palacios, J. 1
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1
Universidad de Zaragoza
info
ISSN: 0966-7318
Año de publicación: 1990
Volumen: 69
Número: 8
Páginas: 1325-1330
Tipo: Artículo
Resumen
Nitrogen, protein and nucleic acids concentrations in the breast muscle (pectoralis thoracica), composition of sarcoplasmic and myofibrillar protein, and serum level of 3-methylhistidine were determined in female Warren chicks at 2, 3, 4 and 6 wk of age. Sarcoplasmic nitrogen and protein concentrations showed opposite changes to those presented by myofibrillar concentrations, with a maximum value at 3 and 4 wk of age and decreasing at 6 wk of age. Ribonucleic acid concentration decreased and protein/ribonucleic acid ratio increased from 2 to 6 wk of age. Differences were observed in the electrophoretical banding pattern of myofibrillar protein at 3 wk of age. Serum level of 3-methylhistidine increased from 2 to 4 wk of age (from .71 to 3.25 nmol/g), and no change was observed at 6 wk of age (3.46 nmol/g).