ATPαS (Sp isomer) sodium salt is another stereoisomer of adenosine 5'-O-(1-thiotriphosphate) (ATPαS), where the sulfur atom replaces one of the non-bridging oxygen atoms at the α-phosphate position in the Sp configuration. This modification affects the molecule's interaction with enzymes differently compared to the Rp isomer. It is useful for dissecting the stereospecificity of enzyme mechanisms and studying ATP-dependent biochemical pathways. The sodium salt form enhances its solubility and stability.
Chemical Structure:
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