Betalains: Compounds derived from TYROSINE via betalamic acid, including BETAXANTHINS and BETACYANINS. They are found in the Caryophyllales order of PLANTS and some BASIDIOMYCETES.Betacyanins: Conjugates of betalamic acid with cyclo-dopa, both of which derive from TYROSINE. They appear similar to INDOLES but are biosynthesized by a different path and contain N+. Members are red or violet COLORING AGENTS found in the Caryophyllales order of PLANTS and some BASIDIOMYCETES.Betaxanthins: Conjugates of betalamic acid with AMINO ACIDS. Some of them are yellow COLORING AGENTS in the Caryophyllales order of PLANTS. This should not be confused with xanthin which is a term used for CAROTENES nor with XANTHINES.Cactaceae: The cactus plant family of the order Caryophyllales, subclass Caryophyllidae, class Magnoliopsida. Cacti are succulent perennial plants well adapted to dry regions.Quaternary Ammonium Compounds: Derivatives of ammonium compounds, NH4+ Y-, in which all four of the hydrogens bonded to nitrogen have been replaced with hydrocarbyl groups. These are distinguished from IMINES which are RN=CR2.