Endothelin-1 (1-31) (Human) is a potent vasoconstrictor and hypertensive agent. Endothelin-1 (1-31) (Human) is derived from the selective hydrolysis of big ET-1 by chymase.

5-CFDA(5-Carboxyfluorescein diacetate) is membrane-permeant. It can be loaded into cells via incubation and hydrolyzed by intracellular esterases to 5-carboxyfluorescein that is used for labeling human intervertebral disk cells in vitro for fluorescence microscopy.

Heptadecanoic acid is a fatty acid of exogenous (primarily ruminant) origin. Many "odd" length long chain amino acids are derived from the consumption of dairy fats (milk and meat).