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 Warmest Colour the Warmest Color" through The Criterion Collection on 25 February 2014. As "Blue Is the Warmest Colour", the film was also released on DVD and Blu-ray Disc in Canada on 25 February 2014 by Mongrel Media, in the United Kingdom on 17 March 2014 by Artificial Eye and on 18 June 2014 in Australia by Transmission Films. In Brazil, Blu-ray manufacturing companies Sonopress and Sony DADC are refusing to produce the film because of its content. The distributor is struggling to reverse this situation. "Blue Is the Warmest Colour" grossed a worldwide total of $19,492,879. During its opening in France,