Hamilton, Brook, Smith & Reynolds, P.C.
Halogenation of cephalexin with haloperoxidase from Rathayibacter biopuresis
 An enzyme preparation that exhibits cephalosporin haloperoxidase activity is isolatable from a microorganism species of the Rathayibacter genus. This enzyme preparation can convert cephalexin to a halogenated cephalosporin antibiotic in a single step. A particular, unique microorganism that can provide the cephalosporin haloperoxidase enzyme preparation is Rathayibacter biopuresis. 
Biopure Corporation
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Yung-Pin Yong-Qiang Bing L.
Chen Shen Wong