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Collisional spectroscopy in structural characterization of melanins. 2--Laser desorption experiments on bio- and synthetic tryptophan melanins.
TLDR
The traditional chemical degradation and physicochemical methods such as ultraviolet, infrared, 1H and 13C nuclear magnetic resonance, ESR (electron spin resonance), XPS (X-rays photoelectron spectroscopy) and X-ray diffraction have led to limited information on melanin chemical structure.
Laser desorption ionization mass spectrometry in the study of natural and synthetic melanins. II--Serotonin melanins.
TLDR
Comparison of molecular weight distributions of the various oligomer sets in serotonin melanins with those in tyrosine melanins revealed clear differences, which are investigated and discussed.
Fast atom bombardment mass spectrometry in the study of dopamine melanogenesis intermediates.
Fast atom bombardment was applied to the study of the intermediates of the reaction dopamine-tyrosinase after treatment with diazomethane. The identification of trimethoxyindoline, dopamine-o-quinone
Collisional spectroscopy in structural characterization of melanins: I. A first study on [C8H7ON](+.) ions originating from pyrolysis of biosynthetic and synthetic tryptophan melanins.
TLDR
These mass spectrometric techniques have shown unequivocally for ionic species [C8H7ON](+.) the structure of 2-indolinone.
Metabolites and enzyme activities involved in tryptophan metabolism in two different strains of mouse.
TLDR
Correlation between total urinary excretion of the tryptophan metabolites and enzyme activities appears in the same strain of mice, even though differences are present in different strains.
Kynurenine pathway enzymes in different species of animals.
TLDR
The activity of aminocarboxymuconate-semialdehyde decarboxylase was higher in kidney than in liver only in guinea pig, whereas in rat and mouse, serum tryptophan levels were higher, rat having the highest concentrations.
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