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Threose is a four-carbon monosaccharide with molecular formula C 4 H 8 O 4. It has a terminal aldehyde group, rather than a ketone , in its linear chain and so is considered part of the aldose family of monosaccharides.
The natural isomer is D-erythrose; it is a diastereomer of D-threose. [3] Fischer projections depicting the two enantiomers of erythrose. Erythrose was first isolated in 1849 from rhubarb by the French pharmacist Louis Feux Joseph Garot (1798-1869), [4] and was named as such because of its red hue in the presence of alkali metals ...
Two older prefixes still commonly used to distinguish diastereomers are threo and erythro. In the case of saccharides, when drawn in the Fischer projection the erythro isomer has two identical substituents on the same side and the threo isomer has them on opposite sides. [ 7 ]
False-color Cassini radar mosaic of Titan's north polar region; the blue areas are lakes of liquid hydrocarbons. "The existence of lakes of liquid hydrocarbons on Titan opens up the possibility for solvents and energy sources that are alternatives to those in our biosphere and that might support novel life forms altogether different from those on Earth."—NASA Astrobiology Roadmap 2008 [1]
This sustainably caught canned tuna 85 mg of sodium, 2.5 grams of fat and isn’t made with any fillers or broth. It's a great choice for salads or sandwiches where you really want the tuna flavor ...
Texas ran a questionable toss play on second-and-goal on Friday night, resulting in a 7-yard loss. Here's how social media reacted to the play:
Travis Kelce recorded his record ninth career 100-yard playoff game as the Chiefs powered past the Texans to their seventh straight AFC title game.
The elementary formula of a simple monosaccharide is C n H 2n O n, where the integer n is at least 3 and rarely greater than 7. Simple monosaccharides may be named generically based on the number of carbon atoms n: trioses, tetroses, pentoses, hexoses, etc.