Homocystine is the double-bonded form of homocysteine but it occurs only transiently before being converted to the harmless cystathionine via a vitamin B6-dependent enzyme. Homocystine and homocysteine-cysteine mixed disulfide account for >98% of total homocysteine in plasma from healthy individuals.

Sempervirine nitrate , a specific molecular inhibitor of Mdm2, to MEF cells abrogated Period 2 ubiquitination leading to the accumulation of a stable pool of Period 2.

Diphenylterazine is a bioluminescence compound.Diphenylterazine alone yields very little background with excellent signal-to-background ratios. Furthermore, Diphenylterazine elicits minimal cell toxicity at millimolar concentrations. Diphenylterazine injections into untransfected BALB/c mice do not yield any background emission.