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Derivation of the formyl-group oxygen of chlorophyll b from molecular oxygen in greening leaves of a higher plant (Zea mays).
| Content Provider | Semantic Scholar |
|---|---|
| Author | Schaefer, Wolfgang Cmiel, Edmund Katheder, Ingrid |
| Copyright Year | 1993 |
| Abstract | Using mass spectroscopy, we demonstrate as much as 93% enrichment of the 7-formyl group oxygen of chlorophyll b when dark-grown, etiolated maize leaves are greened under white light in the presence of 18O2. This suggests that a mono-oxygenase is involved in the oxidation of its methyl group precursor. The concomitant enrichment of about 75% of the 13(1)-oxygen confirms the well-documented finding that this oxo group, in both chlorophyll a and b, also arises from O2. High 18O enrichment into the 7-formyl oxygen relative to the substrate 18O2 was achieved by optimization of the greening conditions in combination with a reductive extraction procedure. It indicates not only a single pathway for Chl b formyl group formation, but also unequivocally demonstrates that molecular oxygen is the sole precursor of the 7-formyl oxygen. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://epub.ub.uni-muenchen.de/2414/1/221.pdf |
| PubMed reference number | 8495742v1 |
| Volume Number | 323 |
| Issue Number | 1-2 |
| Journal | FEBS letters |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Document completion status - Documented Extraction Hodgkin Disease Mass Spectrometry Methyl Group Plant Leaves Prostaglandin-Endoperoxide Synthase Zea mays chlorophyll b negative regulation of reactive oxygen species biosynthetic process oxidation potassium oxonate |
| Content Type | Text |
| Resource Type | Article |
