Biosynthesis of diazomelanin and diazoluminomelanin and methods

Chemistry: molecular biology and microbiology – Measuring or testing process involving enzymes or... – Involving antigen-antibody binding – specific binding protein...

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435 737, 435 772, 435 29, 435 34, 435 41, C12Q 100, C12Q 104, C12Q 126

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058561080

ABSTRACT:
There is provided a method for producing diazoluminomelanin (DALM) which comprises culturing in a medium containing nitrate, 3-amino-L-tyrosine (3-AT) and luminol under suitable metabolic conditions, a microorganism containing nitrate reductase.
Also provided is a method for directly detecting microorganisms containing nitrate reductase or those into which nitrate reductase can be introduced by recombinant DNA technology, which comprises culturing the microorganism in a medium containing nitrate, 3-amino-L-tyrosine (3-AT) and luminol under suitable metabolic conditions, transferring the medium to a microtiter plate or tube coated with antibody or an antiligand to which the microorganism would specifically bind, washing the plate or tube and activating luminescence.
Further, there is provided a method for producing diazomelanin (DM) which comprises culturing in a medium containing nitrate and 3-amino-L-tyrosine (3-AT) under suitable metabolic conditions, a microorganism containing nitrate reductase.
Yet further, there is provided a method for directly detecting microorganisms containing nitrate reductase or those into which nitrate reductase can be introduced by recombinant DNA technology, which comprises culturing the microorganism in a medium containing nitrate and 3-amino-L-tyrosine (3-AT) under suitable metabolic conditions, transferring the medium to a microtiter plate or tube coated with antibody or an antiligand to which the microorganism would specifically bind, washing the plate or tube, adding luminol and activating luminescence.

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Kiel et al, "interactions of the antioxidants 3-amino-L-tyrosine and diazoluminomelanin with cytochrome b of HL-60 cells", Free Radical Biol. Med. 9(supp.1) : 15. (1990).
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