Definition for Prodigiosin
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Prodigiosin is the red pigment produced by many strains of the bacterium Serratia marcescens, other Gram-negative, gamma proteobacteria such as Vibrio psychroerythrus and Hahella chejuensis. It is in a family of compounds termed "prodiginines", which are produced in some Gram-negative gamma proteobacteria, as well as select Gram-positive Actinobacteria (i.e. Streptomyces coelicolor). The name "prodigiosin" is derived from "prodigious" (i.e. something marvelous).