A Hæmoglobin from Bile Pigment
@article{Barkan1938AHF,
title={A H{\ae}moglobin from Bile Pigment},
author={Georg Barkan and Otto Schales},
journal={Nature},
year={1938},
volume={142},
pages={836-837},
url={https://api.semanticscholar.org/CorpusID:4073510}
}The new compound, like hæmoglobin, combines reversibly with oxygen and carbon monoxide, but the non-protein part of its molecule is a bile pigment closely related to verdohæmatin, which might give the impression that the existence of biles pigment-globin compounds was not known before.