Showing papers on "Protoporphyrin IX published in 1970"
TL;DR: The combination of metalloporphyrins to apohemoproteins appeared to be an excellent method of achieving an ideal magnetic dilution of paramagnetic centers for EPR studies.
69 citations
TL;DR: The addition of protoporphyrin IX to medium restored respiratory activity of a respiration-deficient mutant of yeast which lacks all hemoproteins, implying the utilization of protiporphyr in IX for the synthesis of heme c without endogeneous dilution.
10 citations
TL;DR: Syntheses of pemptoporphyrin, isopemptopomorphyrin and protoporphrin IX dimethyl esters by cyclisation of the corresponding 1-bromo-1,19-dideoxy-19-methyl-biladiene-ac dihydrobromides, with use of the 2-(methoxycarbonylamino)ethyl groups as precursors of the peripheral vinyl substituents, are described in this article.
Abstract: Syntheses of pemptoporphyrin, isopemptoporphyrin, and protoporphyrin IX dimethyl esters by cyclisation of the corresponding 1-bromo-1,19-dideoxy-19-methyl-biladiene-ac dihydrobromides, with use of the 2-(methoxycarbonylamino)ethyl groups as precursors of the peripheral vinyl substituents, are described.
10 citations
TL;DR: There is a linear relationship between the paramagnetic chemical shifts of the peripheral methyl groups in low-spin bis-pyridinoiron(III) protoporphyrin IX complexes and the basicity of the co-ordinated pyridine.
Abstract: There is a linear relationship between the paramagnetic chemical shifts of the protons of the peripheral methyl groups in low-spin bis-pyridinoiron(III) protoporphyrin IX complexes and the basicity of the co-ordinated pyridine.
9 citations
TL;DR: The porphyrin is present in the soft parts of the animals in concentrations likely to render them highly photosensitive.
8 citations