Cytidine is a nucleoside molecule made up of cytosine and ribose. It is a component of RNA and plays a role in genetic coding and protein synthesis. Cytidine can also be phosphorylated to form cytidine triphosphate (CTP), an important molecule in energy transfer within cells.

Palghat Venketeswar Hariharan has written:

'The UV photochemistry of cytidylyl-(3'-5')-cytidine' -- subject(s): Cytidylyl cytidine, Photochemistry

Isn't it ATP? * Strictly speaking, a nucleotide has only the one phosphate group. When there are three phosphate groups, the compound is named along these lines: "(base + sugar) triphosphate". So, for example, ATP is named adenosine triphosphate. Likewise for the others: CTP = cytidine triphosphate

GTP = guanosine triphosphate TTP = thymidine triphosphate UTP = uridine triphosphate

Cytidine is composed of one molecule each of cytosine and ribose. The cytosine molecule is the same between DNA and RNA, the difference is in the sugar backbone. In RNA it is ribose while in DNA it is deoxyribose.

Adenosine-5'-triphosphate (ATP)