https://wiki.tiffa.net/w/index.php?action=history&feed=atom&title=Translations%3AAmino_acid%2F18%2FenTranslations:Amino acid/18/en - Revision history2026-09-14T09:30:54ZRevision history for this page on the wikiMediaWiki 1.43.0https://wiki.tiffa.net/w/index.php?title=Translations:Amino_acid/18/en&diff=131775&oldid=prevFuzzyBot: Importing a new version from external source2024-03-29T01:25:11Z<p>Importing a new version from external source</p>
<p><b>New page</b></p><div>There are three amino acids with side chains that are cations at neutral pH: [[arginine]] (Arg, R), [[lysine]] (Lys, K) and [[histidine]] (His, H). Arginine has a charged [[Guanidine|guanidino]] group and lysine a charged alkyl amino group, and are fully protonated at pH 7. Histidine's imidazole group has a pK<sub>a</sub> of 6.0, and is only around 10 % protonated at neutral pH. Because histidine is easily found in its basic and conjugate acid forms it often participates in catalytic proton transfers in enzyme reactions.</div>FuzzyBot