c-Myc Peptide Trifluoroacetate is a synthetic peptide corresponding to the C-terminal amino acids (410-419) of human c-myc protein, and participates in regulation of growth-related gene transcription.

Human proinsulin, the single-chain peptide precursor of insulin, consists of the insulin A and B chains connected by the 31 amino acid C-peptide. Cleavage of proinsulin by proteolytic enzymes produces insulin and free C-peptide.

Cucurbitacin C is a triterpenoid calabinoid that can be isolated from Cucurbitaceae plants. Cucurbitacin C has anti-cancer activity in vivo and in vitro. Cucurbitacin C can induce cell cycle arrest in G1 or G2/M phase and apoptosis by inhibiting Akt signaling.