What is common among the following: arg, his, lys?

Question

Quizplus · Accepted Answer

Arg (arginine), His (histidine), and Lys (lysine) are all basic amino acids, which means they have a positive charge at physiological pH. Histones, which are proteins that DNA wraps around in eukaryotic cells, are indeed enriched in these amino acids. This enrichment allows histones to interact with the negatively charged DNA through ionic and other weak interactions, facilitating the packaging of DNA into chromatin. Therefore, all of the statements are correct.

What Is Common Among the Following: Arg, His, Lys