... accumulates) to assist O 2 off-loading to perfused tissues. The true plasma non-bicarbonate buffer value was moderately higher than in terrestrial mammals and increased upon deoxygenation. Plasma bicarbonate was also relatively high, contributing to increase the overall buffer capacity. The apparent Cl...

..., a small negative Haldane effect was observed at pH values between 6.8 and 8.5 which disappeared in the presence of GTP (molar ratio 3:1 GTP:haemoglobin tetramer). GTP had virtually no effect on the buffer value at fixed oxygenation status, and the lowest buffer value was observed at in vivo pH values...

...-bremerhaven.de † Present address: Institut für Tierphysiologie, Freie Universität Berlin, Grunewaldstrasse 34, D-12165, Berlin, Germany 9 10 1997 9 12 1997 © The Company of Biologists Limited 1988 acid–base regulation ammonia excretion buffer value CO2 partial pressure...