Abstract
AbstractThe 13C resonances for all protonated carbons have been observed and assigned for the free base esters derived from the following natural products: heme d, the prosthetic group of the bacterial cytochrome oxidase cytochrome d; heme d1, the prosthetic group of the dissimilatory nitrite reductase cytochrome cd1; and a stable form of sulfheme, the chemically modified prosthetic group from the degradation product of myoglobin known as sul‐fmyoglobin. These partially saturated porphyrins have in common that a heteroatom or atoms has added to a pyrrolic carbon. 13C NMR spectra were obtained on limited amounts of naturally derived samples by proton‐detected heteronuclear correlation spectroscopy.
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