Biomaterial Database

Postmortem metabolism of short-finned squid muscle (Illex illecebrosus). 1984

S M Langille, and T A Gill

Postmortem biochemical changes were examined in the mantle muscle of the short-finned squid (Illex illecebrosus) in relation to the physical events associated with rigor. Unlike mammalian muscle, the major muscle phosphagen is arginine phosphate rather than creatine phosphate. Arginine phosphate levels did not change dramatically during the progress of rigor development. ATP depletion was found to be closely related to glycogen depletion as is often observed in mammalian muscle. The postmortem accumulation of octopine was related to the initial muscle glycogen content at death but a significant lag in its production was observed. The postmortem conversion of glucose to glucose-6-phosphate appeared to be the rate-limiting step in the overall conversion of glycogen to octopine. The intermediates found in the postmortem catabolism of squid muscle ATP were ADP, AMP, IMP Ino and Hx. Unlike most vertebrate fishes, AMP was found to accumulate in squid before conversion to IMP whereas accumulations of IMP and Ino were less than those normally found in vertebrate muscle.

UI	MeSH Term	Description	Entries
D007700	Kinetics	The rate dynamics in chemical or physical systems.
D009132	Muscles	Contractile tissue that produces movement in animals.	Muscle Tissue,Muscle,Muscle Tissues,Tissue, Muscle,Tissues, Muscle
D011180	Postmortem Changes	Physiological changes that occur in bodies after death.	Adipocere,Algor Mortis,Cruor,Livor Mortis,Change, Postmortem,Changes, Postmortem,Postmortem Change
D004734	Energy Metabolism	The chemical reactions involved in the production and utilization of various forms of energy in cells.	Bioenergetics,Energy Expenditure,Bioenergetic,Energy Expenditures,Energy Metabolisms,Expenditure, Energy,Expenditures, Energy,Metabolism, Energy,Metabolisms, Energy
D005947	Glucose	A primary source of energy for living organisms. It is naturally occurring and is found in fruits and other parts of plants in its free state. It is used therapeutically in fluid and nutrient replacement.	Dextrose,Anhydrous Dextrose,D-Glucose,Glucose Monohydrate,Glucose, (DL)-Isomer,Glucose, (alpha-D)-Isomer,Glucose, (beta-D)-Isomer,D Glucose,Dextrose, Anhydrous,Monohydrate, Glucose
D005958	Glucosephosphates
D006003	Glycogen
D000227	Adenine Nucleotides		Adenine Nucleotide,Adenosine Phosphate,Adenosine Phosphates,Nucleotide, Adenine,Nucleotides, Adenine,Phosphate, Adenosine,Phosphates, Adenosine
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D001120	Arginine	An essential amino acid that is physiologically active in the L-form.	Arginine Hydrochloride,Arginine, L-Isomer,DL-Arginine Acetate, Monohydrate,L-Arginine,Arginine, L Isomer,DL Arginine Acetate, Monohydrate,Hydrochloride, Arginine,L Arginine,L-Isomer Arginine,Monohydrate DL-Arginine Acetate