How many arginine are in a human hemoglobin?

Human hemoglobin consists of four subunits, each containing a heme group and a globin chain. In the adult form of hemoglobin (HbA), there are a total of 8 arginine residues across the alpha and beta chains. Specifically, there are 4 arginine residues in each alpha and beta chain combined, which contributes to the overall structure and function of the protein.