c chemistryPhysical chemistryTheoretical chemistryBiochemistry  fieldsMolecular biologyCell biologyChemical biologyBioorthogonal chemistryMedicinal chemistryPharmacologyClinical chemistryNeurochemistryBioorganic chemistryBioorganometallic chemistryBioinorganic chemistryBiophysical chemistryBacteriologyparasitologyvirologyimmunology.General  chemistryChemical reactionsChemical synthesisMoleculeOrganic reactionsCatalystReagentReaction mechanismConceptsStructural biologyEnzymologyMetabolismBiomoleculeCellsCell theoryRibosomeNucleusPeptideAmino acidsProteinPeptideHormoneEnzymeMetabolic pathwayGenetics:ChromosomesRNADNAGenetic codeBiomolecule  familiesCarbohydrates:AlcoholsGlycoproteinsGlycosidesLipids:EicosanoidsFatty acidsFatty-acid metabolismGlyceridesPhospholipidsSphingolipidsCholesterolSteroidsNucleic acids:NucleobasesNucleosidesNucleotidesNucleotide metabolismProteins:Amino acidsAmino acid metabolismOther:Tetrapyr