Fig. 8
From: Positive selection in octopus haemocyanin indicates functional links to temperature adaptation
Functional and structural pH dependence. a pH change of octopod haemolymph following an imidazole like alpha stat pattern of −0.0153 pH units / °C (redrawn from [16]) b) Differences between the Antarctic Pareledone charcoti (blue) and the Mediterranean Eledone moschata (red) regarding pH dependent oxygen binding at 10 °C and 1kPa PO2 (shaded area denotes 95 % C.I., n = 5, data taken from [16]) and c) net surface charge of the partial haemocyanin region FU f-g at pH 7.27 based on six partial haemocyanin sequences for each species, whose buffer lines partly overlap. The dashed vertical line indicates the venous pH at 10 °C interpolated from a)