Non-Bicarbonate Intracellular Ph Buffering of Reptilian Muscle

Blomberg, S and Baldwin, J (1991) Non-Bicarbonate Intracellular Ph Buffering of Reptilian Muscle. Journal of Comparative Physiology B-Biochemical Systemic and Environmental Physiology, 161 1: 101-107. doi:10.1007/BF00258753

Author Blomberg, S
Baldwin, J
Title Non-Bicarbonate Intracellular Ph Buffering of Reptilian Muscle
Journal name Journal of Comparative Physiology B-Biochemical Systemic and Environmental Physiology   Check publisher's open access policy
ISSN 0174-1578
Publication date 1991-01-01
Year available 1991
Sub-type Article (original research)
DOI 10.1007/BF00258753
Open Access Status Not yet assessed
Volume 161
Issue 1
Start page 101
End page 107
Total pages 7
Place of publication NEW YORK
Publisher Springer-Verlag
Language eng
Abstract Non-bicarbonate intracellular pH buffering values of skeletal and cardiac muscles were measured for 16 species of Australian reptiles from four orders (snakes, skeletal 19-36 slykes, cardiac 9-17 slykes; lizards, skeletal 25-54 slykes, cardiac 17-19 slykes; turtles, skeletal 25-43 slykes, cardiac 11-24 slykes; crocodile, skeletal 43 slykes). Although a positive correlation between pH buffering capacity and dependence on anaerobic muscle work was found, even the highest reptilian pH buffering values were low relative to equivalent white anaerobic muscles of fish, birds, and mammals. The low non-bicarbonate intracellular pH buffering capacity of reptilian muscle arises through lower contributions from proteins (10-14 slykes), non-protein histidine (7-18 slykes) and phosphate (5-15 slykes). It is concluded that while other vertebrates depend on these intracellular buffers for regulating muscle pH during anaerobic muscle work, reptiles rely less on buffering and instead may tolerate greater pH fluctuations.
Keyword Reptile
Salt-Water Crocodile
Acid-Base Regulation
Anaerobic Metabolism
Vertebrate Muscle
Protein Function
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: ResearcherID Downloads - Archived
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