Quaternary ammonium analog of ethidium; an intercalating dye with a specific affinity to certain forms of DNA and, used as diiodide, to separate them in density gradients.

D-Xylose ((2S,3R,4S,5R)-oxane-2,3,4,5-tetrol) is a monosaccharide widely found in yeast and involved in the metabolism of the organism.

Acetyl-(Cys4,D-Phe7,Cys10)-α-MSH (4-13)