Pyrimidine bases are a group of natural substances derived from pyrimidine . They differ in the nature and position of substituents in the pyrimidine nucleus. They are colorless, crystalline substances, with a melting point above 300 ° C, soluble in water, insoluble in alcohols and polar solvents . Pyrimidine bases are obtained by acid hydrolysis of nucleic acids .
Biochemical role
Pyrimidine bases are widespread in animals, plant tissues, and microorganisms. The biologically most important pyrimidine bases are uracil , cytosine , thymine , which are part of nucleic acids , nucleosides , nucleotides .
See also
- Purine bases