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Salt and water balance in the oligohaline clam,Rangia cuneata II. Accumulation of intracellular free amino acids during high salinity adaptation

✍ Scribed by Henry, Raymond P. ;Mangum, Charlotte P. ;Webb, Kenneth L.

Publisher: John Wiley and Sons
Year: 1980
Tongue: English
Weight: 946 KB
Volume: 211
Category: Article
ISSN: 0022-104X
DOI: 10.1002/jez.1402110103

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✦ Synopsis

Abstract

During adaptation to an increase in ambient salinity (2–20 ppt) the estuarine clam Rangia cuneata enlarges the pool of free amino acids in adductor muscle fibers by more than five‐fold (>300 μM/gm dry wt). The process can occur under anaerobic conditions, but oxygen is critical to survival during high salinity adjustment. It is suggested that the pool may be enlarged by de novo synthesis, via a modified form of glycolysis perhaps involving the direct amination of pyruvate to form alanineutilizing free ammonia.

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Salt and water balance in the oligohaline clam,Rangia cuneata III. Reduction of the free amino acid pool during low salinity adaptation

✍ Henry, Raymond P. ;Mangum, Charlotte P. 📂 Article 📅 1980 🏛 John Wiley and Sons 🌐 English ⚖ 599 KB

## Abstract During adaptation to low salinity (from 20 to 2 ppt), the estuarine clam __Rangia cuneata__ reduces the size of a pool of free amino acids in adductor muscle fibers, presumably to control cell volume. The levels of both free amino acids and ammonia in the blood increase, but the rise in