Nucleotide catabolism in cold stored adductor muscle of scallop (Zygochlamys patagonica)

MASSA A. E.; PAREDI M. E.; CRUPKIN M

JOURNAL OF FOOD BIOCHEMISTRY

N. F. Haard. Food and Nutrition Press, INC

Lugar: Trumbull, Connecticut 06611 USA; Año: 2002 vol. 26 p. 295 - 305

0145-8884

The post-mortem catabolism of adenosine triphosphate (ATP) in cold stored scallop adductor muscles was examined. The change in the pH of stored muscles was also investigated. The ATP content increased for a short time after death and afterwards decreased up to 24 h of storage. Thereafter, the nucleotide level remained unchanged up to 120 h of storage. The ADP content slightly decreased up to 48 h and after that remained unchanged. The AMP slowly accumulated to around 15 % of the total nucleotide concentration when the ATP decreased. Small amounts of IMP were detected in all samples. Conversely, adenosine (Ado) was not detected. Inosine (HxR) slightly increased after 48 h of storage and hypoxanthine (Hx) significantly increased after 24 h. The 260/250-absorbance ratio of muscle extracts and the pH of stored muscles fell sharply up to 24 h and then decreased slowly. The Hx contents were positively correlated (p< 0.01) with both the Hx/AMP ratios and the K values