Abstract
WE have previously reported1 the isolation of a pyrrole derivative from the alkaline hydrolysate of bovine submaxillary gland mucoprotein and its identification as 2-carboxy-pyrrole (III). On reduction it yielded 2-carboxy-pyrrolidine (proline), chromatographically it showed the same behaviour as synthetic III, and it gave in the cold a purple colour with Ehrlich's reagent. Recently, the ultra-violet absorption spectra of both the substance prepared from mucoprotein and synthetic III were found to be identical.
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References
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GOTTSCHALK, A. The Precursor of 2-Carboxy-Pyrrole in Mucoproteins. Nature 174, 652–653 (1954). https://doi.org/10.1038/174652b0
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DOI: https://doi.org/10.1038/174652b0
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