Proton affinity of arginine measured by the kinetic approach

This is the authors' abstract. We don't add key points for this paper.

The proton affinity of arginine is obtained from the kinetic method of dissociation of proton‐bound dimers, as 245.2kcal/mol with an uncertainty of ±0.5 kcal/mol higher than that of histidine, the next most basic of the commonly occuring mammalian amino acids, in contrast to the average difference of 1 kcal/mol between the other 19 amino acids. The order of proton affinity of these 20 amino acids is also determined and discussed.