Bursin is a peptide that can be isolated from the bursa of Fabricius of chicken. Bursin induces the phenotypic differentiation of mammalian and avian B precursor cells. Bursin also increases cyclic guanosine monophosphate in cells of the human B-cell line Daudi, its derivatives are able to protect against infection by amplifying the immune response induced by H9N2.

Osteocalcin (7-19) (human) is a peptide fragment of Osteocalcin, can be used as a peptide tag.

Fenquizone (M.G. 13054), a thiazide-like diuretic, exhibits chronic antihypertensive effect. Fenquizone can be used for the research of oedema and hypertension.