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Cytosine (6-Aminopyrimidin-2(1H)-one) is a pyrimidine base that is a fundamental unit of nucleic acids. The deamination of cytosine alone is apparent and the nucleotide of cytosine is the prime mutagenic nucleotide in leukaemia and cancer.

Cytosine-D2 is the deuterated form of Cytosine. Cytosine (T4832) is one of the four principal bases found in DNA and RNA. Modifications to cytosine exhibit circadian rhythmic oscillations associated with epigenetic diversity and aging.

Cytosine-13C,15N2 is the isotopically labeled variant of Cytosine (T4832) containing carbon-13 (13C) and nitrogen-15 (15N). This nucleobase is among the four primary bases found in DNA and RNA and is distinguished by its labeling. Modifications of cytosine are known to display circadian rhythm oscillations linked to epigenetic diversity and aging.

Cytosine-13C,15N2 (Standard) is a reference standard of Cytosine-13C,15N2 intended for quantitative analysis, quality control, and related biochemical research applications. Cytosine-13C,15N2 is the isotopically labeled variant of cytosine containing carbon-13 (13C) and nitrogen-15 (15N). This nucleobase is among the four primary bases found in DNA and RNA and is distinguished by its labeling. Modifications of cytosine are known to display circadian rhythm oscillations linked to epigenetic diversity and aging.