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Carbohydrate-deficient transferrin (CDT, also known as desialotransferrin or asialotransferrin) is a laboratory test used to help detect heavy ethanol consumption. [ 1 ] Physiology
Diterpenes are a class of terpenes composed of four isoprene units, often with the molecular formula C 20 H 32. They are biosynthesized by plants, animals and fungi via the HMG-CoA reductase pathway , with geranylgeranyl pyrophosphate being a primary intermediate.
The provitamin beta carotene is a terpene derivative called a carotenoid. The steroids and sterols in animals are biologically produced from terpenoid precursors. Sometimes terpenoids are added to proteins, e.g., to enhance their attachment to the cell membrane; this is known as isoprenylation.
The terpene alpha-pinene is a major component of the common solvent, turpentine. The one terpene that has major applications is natural rubber (i.e., polyisoprene). The possibility that other terpenes could be used as precursors to produce synthetic polymers has been investigated. Many terpenes have been shown to have pharmacological effects.
Side-products are β-terpineol in a mixture of the cis isomer, the trans isomer, and 4-terpineol. The biosynthesis of α-terpineol proceeds from geranyl pyrophosphate, which releases pyrophosphate to give the terpinyl cation. This carbocation is the precursor to many terpenes and terpenoids. Its hydrolysis gives terpineol.
Sequences containing this protein domain belong to the terpene synthase family. It has been suggested that this gene family be designated tps (for terpene synthase). Sequence comparisons reveal similarities between the monoterpene (C 10) synthases, sesquiterpene (C 15) synthases and the diterpene (C 20) synthases. It has been split into six ...
Amazon’s Panos Panay hinted that the new Alexa would elicit “emotion” and “connection.” “The products coming,” he added, “are pretty awesome.” ...
Humulene, also known as α-humulene or α-caryophyllene, is a naturally occurring monocyclic sesquiterpene (C 15 H 24), containing an 11-membered ring and consisting of 3 isoprene units containing three nonconjugated C=C double bonds, two of them being triply substituted and one being doubly substituted.