Some are further divided into subtypes. â¢ OCA1, or tyrosinase-related albinism, results from a genetic defect in an enzyme called tyrosinase. This enzyme helps the body to change the amino acid, tyrosine, into pigment. (An amino acid is a âbuilding blockâ of protein.) There are two subtypes of OCA1.
Pyrimidine is group of molecules that are part of the DNA and RNA structure. These molecules feature a single ring structure made of six atoms. There are several pyrimidine molecules, but only cytosine and thymine are part of the DNA structure, while cytosine and uracil are part of the RNA structure. These molecules bind with their purine counterparts to join the two strands of the DNA or RNA polymer.
Pyridoxine, page 2. Pyridoxine, or vitamin B6, is a coenzyme in reactions of amino acid, carbohydrate, and fat metabolism. Vitamin B6 is actually a term used for a group of vitamins with similar functions: pyridoxine, pyridoxal, and pyridoxamine. All are precursors to pyridoxine coenzyme pyridoxalphosphate (PLP).