The high intracellular ph buffering of hagfish (Eptatretus cirrhatus) dental plate retractor muscle cannot be attributed to the known histidine-related compounds present in other vertebrates

J. Baldwin, S. Blomberg, M. Aguilar, P. Stanton, M. T W Hearn

Research output: Contribution to journalArticleResearchpeer-review

Abstract

1. 1. Intracellular pH buffering capacity of hagfish (Eplatretus cirrhatus) dental plate retractor muscles is among the highest reported for any vertebrate muscle. 2. 2. Over 80% of the pH buffering capacity of hagfish retractor and myotome muscle is due to components other than proteins and phosphate. 3. 3. The muscles have less than 0.5 μmol/g wet weight of l-histidine, and lack l-l-methyl histidine, l-3-methyl histidine and the histidine-containing dipeptides anserine, carnosine and ophidine. 4. 4. Instead, they contain an unidentified low molecular weight acid-soluble compound to which the high pH buffering capacity can be attributed.

Original languageEnglish
Pages (from-to)731-734
Number of pages4
JournalComparative Biochemistry and Physiology - Part A: Physiology
Volume100
Issue number3
DOIs
Publication statusPublished - 1991

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