Respiratory pigment Respiratory pigment A respiratory pigment is a molecule, such as hemoglobin in humans and other vertebrates, that increases the oxygen-carrying capacity of the blood. The four most common invertebrate respiratory pigments are hemoglobin, hemocyanin, hemerythrin and chlorocruorin. Hemoglobin is bright red when oxygenated, and dark red(purplish) when deoxygenated, oxygenated hemocyanin is blue in colour, deoxygenated it is almost colourless. Oxygenated chlorocruorin turns from green to red, whereas oxygenated hemerythrin is a violet to pink colour and colourless when deoxygenated. Any of various coloured conjugated proteins, such as hemoglobin, occur in living organisms and function in oxygen transfer in cellular respiration.
Blue Is the Colour Blue Is the Colour Blue Is the Colour is the fifth studio album from English band The Beautiful South, released in October 1996 through Go! Discs and in America through Ark 21 Records. Following the two singles "Pretenders to the Throne" and "Dream a Little Dream", which never featured on any album until the release of the second greatest hits "Solid Bronze" in 2001, it was named after a pub in Sheffield. The album continued the melancholic tone of its predecessor "Miaow", and is generally considered to be the band's darkest effort, reflecting Heaton's life at the time. This comes