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The subsequent reaction indicates the combination between CO2 and the amino group on protein, including haemoglobin.
In plasma the protein concentration is about 7%. However, in the RBCs, haemoglobin – the principal erythrocyte protein – constitutes about 30% of the contents, so a greater amount is proportionately transported intracellularly as haemoglobinic acid. The amount of CO2 bound as carbamate to Hb in erythrocytes or to plasma proteins depends on Hb O2 saturation, 2,3-diphosphoglycerate (2,3-DPG) concentration in the case of RBCs, and on [H+] in the case of both RBCs and plasma.
What percentage of the transported carbon dioxide is carried by the varying modalities below?
Select the percentage for each modality.