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Table 1 AMPD maximal activity (Vmax) and partitioning between free and bound forms in skeletal muscle from control (5°C-acclimated) and 24 h frozen frogs.

From: Regulation of 5'-adenosine monophosphate deaminase in the freeze tolerant wood frog, Rana sylvatica

  Vmax (U/gww) % of total activity
Control   
Free AMPD 17.6 ± 1.53 79.7 ± 6.46
Bound AMPD 4.5 ± 0.03 20.3 ± 0.13
Total 22.1 ± 1.56 100.0
Frozen   
Free AMPD 17.8 ± 0.69 64.6 ± 2.07 a
Bound AMPD 9.8 ± 0.03 a 35.4 ± 0.09 a
Total 27.6 ± 0.72 a 100.0
  1. Data are expressed as units per gram wet weight (U/gww), means ± SEM, for determinations on muscle preparations from n = 8 individual frogs. a Significantly different from the corresponding value in control muscle by the Student's t-test, P < 0.05; percentage data were evaluated after arcsine √ transformation of the raw data.