:: Volume 15, Number 4 (10-2016) ::
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Effects of long-term frozen storage on the compositions of free amino acids and nucleotide-related compounds of the coconut crab Birgus latro
T Sato *, S Ohgami, M Kaneniwa
Fisheries Research Agency , takusato@affrc.go.jp
Abstract:   (1175 Views)

This study examined the effects of long-term frozen storage (-20 °C for 5 months) of free amino acids (FAAs) and nucleotide-related compounds (NRCs) in muscle and hepatopancreas of the coconut crab Birgus latro. Although long-term frozen storage had little effect on FAA composition in muscle, the amounts of several FAAs increased in the hepatopancreas that may be the result of protein decomposition during the frozen storage. Long-term storage at -20°C significantly increased the amounts of disodium 5ʹ-inosine monophosphate (IMP) in muscle and hepatopancreas, resulting from the deaminase activity of 5ʹ-adenosine monophosphate (AMP) which deaminates AMP to IMP. Changes in FAAs and NRCs may result in changes in the flavor of muscle and hepatopancreas of frozen stored coconut crabs, both through altered amounts of each substance and synergistic interactions among substances.

Keywords: Birgus latro, Free amino acid, Nucleotide-related compound, Fatty acid, Taste active value
Full-Text [PDF 218 kb]   (1021 Downloads)    
Type of Study: Orginal research papers | Subject: Fish processing
Received: 2015/07/6 | Accepted: 2015/11/24 | Published: 2016/10/22



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Back to browse issues page Volume 15, Number 4 (10-2016)