The Preparation and some Properties of the Globin of Oxyhaemoglobin

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Abstract
From the oxyhemoglobin of ox blood has been prepared a protein which is considered to be the true globin of this conjugated protein. This globin is soluble in the presence or absence of salts over the range p H 5-10. Spectroscopic evidence is presented of the identity of the reconstituted oxyhemoglobin and the original oxyhemoglobin from which the globin of the former was prepared. Globin reacts with hematin over the range p H 5-10 to give methemoglobin. This equilibrium has been investigated on the acid side. Evidence is given of the occurrence of compounds of globin with certain porphyrins and their metallic derivatives. Oxyhemoglo-bins have been prepared from the iron compounds of hematoporphyrin and mesoporphyrin.

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