出典:Wikipedia
出典:『Wikipedia』 (2011/06/11 01:41 UTC 版)
Guanosine-5'-triphosphate (GTP) is a purine nucleotide. It can act as a substrate for the synthesis of RNA during the transcription process. Its structure is similar to that of the guanine nucleobase, the only difference being that nucleotides like GTP have a ribose sugar and three phosphates, with the nucleobase attached to the 1' and the triphosphate moiety attached to the 5' carbons of the ribose.