Literature DB >> 179142

Ion-exchange in melanin: an electron spin resonance study with lanthanide probes.

T Sarna, J S Hyde, H M Swartz.   

Abstract

Changes are induced in the electron spin resonance signal amplitude and microwave power saturation of the naturally occurring free radical in melanin by bound paramagnetic ions. The changes serve as experimental observables in competition experiments between diamagnetic and paramagnetic metal ions for melanin binding sites and between melanin and ethylenediaminetetraacetic acid for paramagnetic metal ions. Evidence is presented for the existence of several specific types of metal binding sites. The interaction of copper with free radicals leading to loss of electron spin resonance signal amplitude is magnetic in nature and not, as has been supposed, chemical.

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Year:  1976        PMID： 179142     DOI： 10.1126/science.179142

Source DB:  PubMed          Journal:  Science        ISSN： 0036-8075            Impact factor:   47.728


  18 in total

1.  The role of hydrogen peroxide and singlet oxygen in the photodegradation of melanin.

Authors:  Andrzej Żądto; Shosuke Ito; Michał Sarna; Kazumasa Wakamatsu; Krystian Mokrzyński; Tadeusz Sarna
Journal:  Photochem Photobiol Sci       Date:  2020-04-20       Impact factor: 3.982

2.  Role of semiconductivity and ion transport in the electrical conduction of melanin.

Authors:  Albertus B Mostert; Benjamin J Powell; Francis L Pratt; Graeme R Hanson; Tadeusz Sarna; Ian R Gentle; Paul Meredith
Journal:  Proc Natl Acad Sci U S A       Date:  2012-05-21       Impact factor: 11.205

3.  Direct chemical evidence for eumelanin pigment from the Jurassic period.

Authors:  Keely Glass; Shosuke Ito; Philip R Wilby; Takayuki Sota; Atsushi Nakamura; C Russell Bowers; Jakob Vinther; Suryendu Dutta; Roger Summons; Derek E G Briggs; Kazumasa Wakamatsu; John D Simon
Journal:  Proc Natl Acad Sci U S A       Date:  2012-05-21       Impact factor: 11.205

4.  Structure and Function of Iron-Loaded Synthetic Melanin.

Authors:  Yiwen Li; Yijun Xie; Zhao Wang; Nanzhi Zang; Fabio Carniato; Yuran Huang; Christopher M Andolina; Lucas R Parent; Treffly B Ditri; Eric D Walter; Mauro Botta; Jeffrey D Rinehart; Nathan C Gianneschi
Journal:  ACS Nano       Date:  2016-11-01       Impact factor: 15.881

5.  Oxidative stress increases HO-1 expression in ARPE-19 cells, but melanosomes suppress the increase when light is the stressor.

Authors:  Anna Pilat; Anja M Herrnreiter; Christine M B Skumatz; Tadeusz Sarna; Janice M Burke
Journal:  Invest Ophthalmol Vis Sci       Date:  2013-01-07       Impact factor: 4.799

6.  Melanin production by a filamentous soil fungus in response to copper and localization of copper sulfide by sulfide-silver staining.

Authors:  T Caesar-Tonthat; K F Van Ommen; G G Geesey; J M Henson
Journal:  Appl Environ Microbiol       Date:  1995-05       Impact factor: 4.792

7.  5,6-Dihydroxyindole-2-carboxylic acid is incorporated in mammalian melanin.

Authors:  K Tsukamoto; A Palumbo; M D'Ischia; V J Hearing; G Prota
Journal:  Biochem J       Date:  1992-09-01       Impact factor: 3.857

8.  Antioxidants in grasshoppers: higher levels defend the midgut tissues of a polyphagous species than a graminivorous species.

Authors:  Raymond V Barbehenn
Journal:  J Chem Ecol       Date:  2003-03       Impact factor: 2.626

9.  Current understanding of the binding sites, capacity, affinity, and biological significance of metals in melanin.

Authors:  Lian Hong; John D Simon
Journal:  J Phys Chem B       Date:  2007-06-20       Impact factor: 2.991

Review 10.  Interactions of iron, dopamine and neuromelanin pathways in brain aging and Parkinson's disease.

Authors:  Fabio A Zucca; Juan Segura-Aguilar; Emanuele Ferrari; Patricia Muñoz; Irmgard Paris; David Sulzer; Tadeusz Sarna; Luigi Casella; Luigi Zecca
Journal:  Prog Neurobiol       Date:  2015-10-09       Impact factor: 11.685
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