Each of the 20 amino acids has a specific side chain, known as an R group, that is also attached to the α carbon. The R groups have a variety of shapes, sizes, charges, and reactivities.

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Researchers assessed the preclinical in vitro efficacy of SYD-5115 (Byondis BV), a novel low-molecular-weight thyrotropin receptor (TSH-R) antagonist. The compound comprises an N-acetylated ...