deoksyguanozyna

Deoxyguanosine is a deoxynucleoside, which is a nucleoside composed of deoxyribose and guanine. Deoxyguanosine is one of the four deoxyribonucleosides that make up DNA. The other three are deoxyadenosine, deoxycytidine, and deoxythymidine.

In DNA, deoxyguanosine is paired with deoxycytidine via three hydrogen bonds. This pairing is essential for maintaining the double helix structure of DNA and for accurate DNA replication and transcription. Deoxyguanosine plays a crucial role in genetic information storage and transmission.

The structure of deoxyguanosine consists of a deoxyribose sugar molecule attached to a guanine base. Deoxyribose is a five-carbon sugar that differs from ribose by the absence of an oxygen atom at the 2' carbon. This deoxygenation is what makes it "deoxy" and forms the backbone of DNA. Guanine is one of the four nitrogenous bases found in DNA and RNA, characterized by its purine structure.

Deoxyguanosine can be found in various biological contexts. It is a building block of the DNA molecule, present in the chromosomes of all living organisms. Modifications of deoxyguanosine can occur, such as phosphorylation, leading to deoxyguanosine triphosphate (dGTP), which is the direct precursor for DNA synthesis. Research into deoxyguanosine and its derivatives is important for understanding DNA structure, function, and repair mechanisms.