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.

Cys-Gly-Lys-Lys-Gly-Amyloid β-Protein (35-40)

Ilexoside D has ant-allergic, and anti-coagulant activities, it shows anti-tissue factor activity as well as the antithrombotic activity.