Relaxation of the myosin regulated striated adductor muscles of Pecten maximus was initiated by the photolysis of the caged Ca2+ chelator, Diazo-2. The fibres relaxed to approximately 30% of the maximum tension with a mean half-time of 17.9 +/- 1.6 ms (n = 7, temp 12 degrees C), much faster than the rates observed in intact muscle at the same temperature. This indicates that in the intact adductor muscle the slower relaxation rate is determined by the speed of Ca2+ removal from the sarcoplasm. The faster rate of relaxation of scallop muscle in vitro, compared with frog skeletal muscle may reflect different mechanisms of regulation of the crossbridge cycle.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/0006-291x(90)91707-y | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Accumulation and depuration of 4,5-dihydro-KmTx2 from Karlodinium veneficum in the bivalves, Mercenaria mercenaria and Sinonovacula constricta.
Harmful Algae
November 2024
Key Laboratory of Applied Marine Biotechnology, Ningbo University, Chinese Ministry of Education, Ningbo, Zhejiang 315211, China; School of Marine Science, Ningbo University, Ningbo, Zhejiang 315211, China; Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China. Electronic address:
Bivalves (e.g., clams, oysters, mussels, scallops) are a significant part of the global diet and are harvested for their nutritional value, but as filter feeders they are susceptible to the accumulation of toxins produced by certain species of phytoplankton.
View Article and Find Full Text PDFMulti-tissue metabolomic profiling reveals the crucial metabolites and pathways associated with scallop growth.
BMC Genomics
November 2024
MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, 5 Yushan Road, Qingdao, 266003, China.
Background: Bivalves represent a vital economic resource in aquaculture for their high productivity and extensive market demand. Growth is one of the most important and desired aquaculture traits for bivalves, regulated by multiple levels, notably intricate metabolic processes. However, the understanding of the metabolic profiles that influence bivalve growth is limited, particularly from a multi-tissue perspective.
View Article and Find Full Text PDFFunctional allocation of Mitogen-activated protein kinases (MAPKs) unveils thermotolerance in scallop Argopecten irradians irradians.
Mar Environ Res
November 2024
MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, 5 Yushan Road, Qingdao, 266003, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao Marine Science and Technology Center, Qingdao, 266237, China.
Global warming has significantly impacted agriculture, particularly in animal husbandry and aquaculture industry. Rising ocean temperatures due to global warming are severely affecting shellfish production, necessitating an understanding of how shellfish cope with thermal stress. The mitogen-activated protein kinases (MAPK) signaling pathway plays a crucial role in cell growth, differentiation, adaptation to environmental stress, inflammatory response, and managing high temperature stress.
View Article and Find Full Text PDFAMPK-mediated regulation of cardiac energy metabolism: Implications for thermotolerance in Argopecten irradians irradians.
Gene
January 2025
MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, 5 Yushan Road, Qingdao 266003, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.
AMPK is a key regulator of metabolism in eukaryotes across various pathways related to energy regulation. Although extensive investigations of AMPK have been conducted in mammals and some model organisms, research on AMPK in scallops is comparatively limited. In this study, three AMPK family genes (AiAMPKα, AiAMPKβ and AiAMPKγ) in scallop Argopecten irradians irradians were identified through genome scanning.
View Article and Find Full Text PDFControlling the quality of Patinopecten yessoensis from the perspective of the ultrasound and ferulic acid influences.
J Food Sci
October 2024
Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute, Xinjiang Uygur Autonomous Region, Urumqi, P. R. China.
In this study, the effects of ultrasound combined with ferulic acid (FA) on the quality of the Yesso scallop (Patinopecten yessoensis) adductor muscles (SAM) during refrigerated storage were investigated. The results demonstrated that the combined treatment with 350 W ultrasound and FA (UFA) significantly delayed enzyme activities and microbial growth in SAM tissues compared to FA treatment alone. After 6 days of cold storage, samples treated with UFA exhibited higher hardness (2850 g), lower thiobarbituric acid reactive substances (TBARS = 9.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!