from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Plural form of carboxyl.
Sorry, no etymologies found.
Nucleic acids and carboxyls (or whatever, its been a long time since I was in school, canchatell?) are relatively large classes (in the nested hierarchy), and why can't 16 amino acids work as well, or five different nts?
It is natural to assume that this ester form is much more prevalent in Nature than a combination of two carboxyls by the elimination of water.