Activities of hexokinase, phosphofructokinase and pyruvate kinase in the body wall, pyloric caeca and tube feet of Asterias vulgaris: Evidence of body wall as a major source of glycolytic activity

Academic Article

Abstract

  • 1. 1. The activities of hexokinase (HK) and pyruvate kinase (PK) were significantly higher than the activity of phosphofructokinase (PFK) in the body wall, pyloric caeca and tube feet. 2. 2. When expressed as a function of wet weight, the specific activity of HK was highest in the pyloric caeca. When expressed as a function of cytosolic protein, the specific activity of HK was highest in the body wall. 3. 3. Specific activities PFK and PK, expressed as functions of cytosolic protein, were highest in the tube feet. These enzyme activities should reflect the high energetic requirements of the tube feet. 4. 4. Highest total activity of PFK was found in the body wall. These results support the conclusion that the body wall is a metabolically active organ and that the energetic requirement of the body wall is a significant component of the energetic requirements of the organism. © 1989.
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    Digital Object Identifier (doi)

    Author List

  • Saito N; Watts SA
  • Start Page

  • 263
  • End Page

  • 267
  • Volume

  • 94
  • Issue

  • 2