1) Copper protein 
Azurin is a bacterial blue copper protein found in Pseudomonas, Bordetella, or Alcaligenes bacteria, which undergoes oxidation-reduction between Cu(I) and Cu(II), and transfers single electrons between enzymes associated with the cytochrome chain. The protein has a molecular weight of approximately 16,000, contains a single copper atom, is intensi...
1. <protein> Blue copper containing protein from Pseudomonas aeruginosa ... 2. Histochemical dye. ... (18 Nov 1997) ... 
(1) Blue copper-containing protein from Pseudomonas aeruginosa (2) Histochemical dye.