guanine
鸟嘌呤,鸟苷,鸟氨酸,鸟类
Definitions
- 1
Biochemistry.
- : a purine base, C5H5N5O, that is a fundamental constituent of DNA and RNA, in which it forms base pairs with cytosine. Symbol: G
Examples
Inside the reflective flash spots lie little platelets of the compound guanine that have grown in such a way that they can reflect colorful light depending on the angle.
What gives the fish guanine platelets particular abilities though remains a puzzle.
In earlier work, he’s shown how guanine platelets can be manipulated in magnetic fields, suggesting that such sensors could be targeted and herded.
The cutis contains several kinds of specialized cells in many layers, each filled with minute granules of guanine.
Adenine and guanine are constituents of all nucleic acids (see below) and, hence, are found in all plant and animal tissues.
Besides white (guanine) cells, the pigment includes black, brown, yellow and red.
The artificial preparation of theobromine and caffeine from xanthine, and guanine also show clearly their relations.
It was first prepared in 1861 by A. Strecker, who oxidized guanine with hydrochloric acid and potassium chlorate.