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Fig. 1. The relationship between blood oxygen affinity calculated at a pH of 7.6,
expressed as logP50, and (A) red blood cell haemoglobin
content ([Hb]RBC) as an indicator of cell volume and (B) the
relationship between the concentrations of organic phosphates and total
haemoglobin ([NTP]/[Hb4] ratio) within the red blood cells. Open
symbols represent data from unfed control snakes measured at 0 h and 48 h,
while closed symbols represent data obtained from snakes before (0 h) and
after (48 h) feeding. Data are presented as means ± 1 S.E.M.
(N=9 for postprandial animals and N=4 or 5 for fasting
controls).