Cytosine (/ ˈ s aɪ t ə ˌ s iː n,-ˌ z iː n,-ˌ s ɪ n / [2] [3]) (symbol C or Cyt) is one of the four nucleotide bases found in DNA and RNA, along with adenine, guanine, and thymine (uracil in RNA). It is a pyrimidine derivative, with a heterocyclic aromatic ring and two substituents attached (an amine group at position 4 and a keto group ...

胞嘧啶，学名为4-氨基-2-羰基嘧啶，是一种有机物，分子式为C4H5N3O。是核酸(DNA和RNA)中的主要碱基组成成分之一。胞嘧啶可由二巯基脲嘧啶、浓氨水和氯乙酸为原料合成制得。用作药物中间体。简写为C。核酸中嘧啶型碱基之一。存在于DNA和RNA中。在植物DNA中，除胞嘧啶外，还有少量的5-甲基胞嘧啶 ...

cytosine, a nitrogenous base derived from pyrimidine that occurs in nucleic acids, the heredity-controlling components of all living cells, and in some coenzymes, substances that act in conjunction with enzymes in chemical reactions in the body. Cytosine is one of several types of bases that are incorporated into the nucleic acid molecule.

Cytosine is an aminopyrimidine that is pyrimidin-2-one having the amino group located at position 4. It has a role as a human metabolite, an Escherichia coli metabolite, a Saccharomyces cerevisiae metabolite and a mouse metabolite.

5 天之前 · Cytosine (C) is one of the four nucleotide bases in DNA, with the other three being adenine (A), guanine (G) and thymine (T). Within a double-stranded DNA molecule, cytosine bases on one strand pair with guanine bases on the opposite strand. The sequence of the four nucleotide bases encodes DNA’s information.

Deamination of cytosine contributes to genetic variability by promoting purposeful mutations, as evidenced in the maturation of immune responses. Cytosine methylation or oxidation refines the genome by tailoring a gene program to a given cell lineage or altering gene expression in the face of environmental changes.

2018年11月8日 · Cytosine is found in DNA and RNA or as a part of a nucleotide. When the nucleoside cytidine binds with three phosphate groups, it forms cytidine triphosphate (CTP). This molecule can act as a co-factor to enzymes and it aids in transferring a phosphate to convert adenosine diphosphate (ADP) to adenosine triphosphate (ATP) to prepare the ATP to ...

DNA is made up of four building blocks called nucleotides: adenine (A), thymine (T), guanine (G), and cytosine (C). The nucleotides attach to each other (A with T, and G with C) to form chemical bonds called base pairs, which connect the two DNA strands.

cytosine /ˈsaɪtəsɪn/ 1.N a white crystalline pyrimidine occurring in nucleic acids; 6-amino-2-hydroxy pyrimidine. Formula: C4H5N3O 胞核嘧啶 → see also DNA, RNA [1]

Cytosine is one of the four nucleotide bases found in DNA and RNA, along with adenine, guanine, and thymine. It is a pyrimidine derivative, with a heterocyclic ...