other, essential, important, various, necessary, several, additional, specific, organic, certain, different, folate, environmental, potential, appropriate, possible, bound, active, nucleotide, enzymatic, common, transcriptional, corresponding, alien, cellular, respective, inorganic, multiple, endogenous, metabolic, containing, associated, exogenous, complex, metallic, soluble, genetic, reduced, nuclear, numerous, distinct, critical, biological, principal, expensive, enzyme, unidentified, unknown, metal, viral, mutual, activated, derived, intracellular, key, ionic, unique, binding, synthetic, synergistic, oxidizable, regulatory, molecular, interdependent, nutritional, required, catalytic, dissociable, cytosolic, vital, added, related, putative, mitochondrial, pteridine, associating, extracellular, dental, relevant, novel, infectious