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Steroids and derivatives

Any of a large class of organic compounds with a characteristic molecular structure containing four rings of carbon atoms (three six-membered and one five) and associated derivatives; includes many hormones, alkaloids, and vitamins.

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Invitrogen™ NBD Cholesterol (22-(N-(7-Nitrobenz-2-Oxa-1,3-Diazol-4-yl)Amino)-23,24-Bisnor-5-Cholen-3β-Ol)

This fluorescent analog, NBD cholesterol, is an environment-sensitive probe that localizes in the membrane's interior and is useful for investigating lipid transport processes as well lipid-protein interactions.