Gastrin I (human) (sulfated) is a polypeptide that can be found by peptide screening. Peptide screening is a research tool that pools active peptides primarily by immunoassay. Peptide screening can be used for protein interaction, functional analysis, epitope screening, especially in the field of agent research and development.

HEX3 is a fragment of the adenoviral hexon. Hexon is the major capsid protein of adenovirion and is comprised of three identical polypeptide chains.

Ergostenol is a biological precursor and a provitamin of vitamin D2.