Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The flavin reductase ActVB from Streptomyces coelicolor:
  characterization of the electron transferase activity of the flavoprotein
  form   The flavin reductase ActVB is involved in the last step of actinorhodin
biosynthesis in Streptomyces coelicolor. Although ActVB can be isolated with
some FMN bound, this form was not involved in the flavin reductase activity. By
studying the ferric reductase activity of ActVB, we show that its FMN-bound
form exhibits a proper enzymatic activity of reduction of iron complexes by
NADH. This shows that ActVB active site exhibits a dual property with regard to
the FMN. It can use it as a substrate that goes in and off the active site or
as a cofactor to provide an electron transferase activity to the polypeptide.

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The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga