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Raymond Holton, Jack Myers (1967)
Water-soluble cytochromes from a blue-green alga. I. Extraction, purification, and spectral properties of cytochromes C (549, 552, and 554, Anacystis nidulans).Biochimica et biophysica acta, 131 2
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Raymond Holton, Jack Myers (1967)
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203 88 88 1 1 J. Francisco T. Sala Justino Burgos Facultad de Veterinaria Cátedra de Bioquímica y Tecnología de los Alimentos León Spain Summary 1. A water soluble cytochrome c from Hemispora stellata has been obtained in a highly purified state by a series of steps involving (NH 4 ) 2 SO 4 precipitation and DEAE chromatography. 2. Absorption spectrum of the highly purified cytochrome c (550; H. stellata ) in the reduced state shows maxima at 550, 520, 416, 357–362 nm and 310–320 nm. It has a symmetrical α band and ratios of α red. /prot. ox and Soret red /α red. are 1 and 6.4 respectively. The purified cytochrome has a mesoheme prosthetic group, its molecular weight is about 17500, its isoelectric point is at pH higher than 8.6 and its É o is+0.28. 3. During DEAE chromatography of buffer extracts as well as of purified samples of cytochrome c (550; H. stellata ) two bands were formed. Chromatographic experiments performed with pure samples of cytochrome c (550; H. stellata ) and with horse heart cytochrome c from a commercial source suggest that this second band in the DEAE chromatographies is due to protein denaturation during the purification procedure. 4. Cytochrome c (550; H. stellata ) is similar to cytochromes of microorganisms belonging to the families Cryptococcaceae and Moniliaceae and although it is also spectrophotometrically similar to cytochrome c from horse heart it has a highar molecular weight and midpoint redox potential.
Archives of Microbiology – Springer Journals
Published: Mar 1, 1973
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