which amino acids are positively charged?
Arg, His, Lys
The amino acids that are positively charged are:
1. Arginine (Arg/R): It has three positively charged functional groups and is considered the most basic amino acid.
2. Lysine (Lys/K): It has one positively charged functional group and is considered a basic amino acid.
3. Histidine (His/H): It has one positively charged functional group and can be considered either a basic or acidic amino acid, depending on the pH of the environment.
All three amino acids have a basic or alkaline side chain, which allows them to form positively charged ions at physiological pH. These amino acids are important in enzyme catalysis and protein interactions, as they can form salt bridges and hydrogen bonds with negatively charged molecules or molecules with acidic side chains.
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