THE CO2 SENSITIVITY OF THE HEMOCYANINS AND ITS RELATIONSHIP TO Cl- SENSITIVITY

摘要: The effect of CO2 on hemocyanin-oxygen binding is not generally related to the Cl-. Some hemocyanins respond both and some either one alone. direction responses O2 affinity various poorly correlated with other effectors. influence Busycon Limulus reaches its maximum at high pH. Since can be abolished by restoring divalent cation activities control levels prior addition CO2, we suggest that specific but rather indirect, pairing allosteric effectors Ca+2 Mg+2 anions. In contrast crustacean greaterat low pH it enhanced maintaining HCO3- within narrow limits permitting PCO2 vary a large factor. This finding suggests effective species molecular CO2. While influences only oxygen affinity, may cooperativity as well. Indifferen...