A kinetic study of muscle pyruvate kinase from Carcinus maenas.

mantle coincided with the time when the greatest shell shoot was measured (Table 1, day 40). Our results support the view that, at least in mantle tissue, there is a direct correlation between shell formation and carbonic anhydrase activity. A major function of the gill is gaseous exchange, and the fact that gill carbonic anhydrase activity follows a similar pattern of change to that of new shell formation is difficult to explain on the basis of the present data unless there is a direct link between tissue metabolism and shell synthesis.