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Enantiotopic groups need not be attached to the same atom. For example, two hydrogen atoms adjacent to the carbonyl group in cis -2,6-dimethylcyclohexanone are enantiotopic; they are related by an internal plane of symmetry passing through the carbonyl group, but deprotonation on one side of the carbonyl group or on the other will generate ...
Heterotopia within the brain is often divided into three groups: subependymal heterotopia, focal cortical heterotopia and band heterotopia. Another example is a Meckel's diverticulum, which may contain heterotopic gastric or pancreatic tissue. In biology specifically, heterotopy refers to an altered location of trait expression. [1]
Enantioselective synthesis, also called asymmetric synthesis, [1] is a form of chemical synthesis.It is defined by IUPAC as "a chemical reaction (or reaction sequence) in which one or more new elements of chirality are formed in a substrate molecule and which produces the stereoisomeric (enantiomeric or diastereomeric) products in unequal amounts."
Another well-known example is the environmentally induced heterotopic change seen in the melanin of the Himalayan rabbit and the Siamese cat and related breeds. In the Himalayan rabbit pigments in fur and skin are only expressed in the most distal portions, the very ends of limbs.
This transformation may be rendered asymmetric if two enantiotopic ester groups exist in the substrate or if a racemic mixture of chiral esters is used. In the former case ( desymmetrization ), the chiral environment of the enzyme active site leads to selective hydrolysis of the ester that is closer to the catalytically active serine residue ...
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I reached out to a sex therapist and a non-monogamy educator to talk all things kink vs. fetish, in case you want to explore one—or both—in the bedroom. (Because, spoiler alert, they're not ...