Modifiers matching peptide:

• analgesic,
• active,
• interesting,
• endogenous,
• synthetic,
• proinflammatory,
• natural,
• antigenic,
• addictive,
• psychoactive,
• anticancer,
• minor,
• foreign,

Simple categories matching endogenous:

• substance,
• change,
• compound,
• amine,
• material,
• pigment,
• acceptor,
• hormone,
• corticoid,
• substrate,
• steroid,
• cation,
• polysaccharide,
• solute,
• process,
• chemical,
• reactant,
• diamine,
• molecule,
• variable,
• proteinase,
• chromophore,
• neurotransmitter,
• nucleoside,
• pathogen,
• vasopressor,
• volatile,
• acid,
• virus,
• sugar,
• opsonin,
• protein,
• glucocorticoid,
• factor,
• catecholamine,
• enzyme,
• vasoconstrictor,
• metal,
• cofactor,
• damage,
• constituent,
• antigen,
• contaminant,
• protease,
• sterol,
• control,
• estrogen,
• fluid,
• carbohydrate,
• cause,
• soporific,
• lipid,
• peptide,
• activator,
• agent,
• androgen,
• phosphatase,
• system,
• signal,
• component,
• nucleotide,
• corticosteroid,
• gene,
• metabolite,
• lipoprotein,
• buffer,
• ion,
• macromolecule,
• ligand,
• receptor,
• monoamine,