D,L-SFN (1-isothiocyanato-4-(methylsulfinyl)-butane) and the potassium salt of its GLS precursor GRN (4-methylsulfinylbutylglucosinolate), DEAE-Sephadex A-25 and Sephadex LH-20, formic acid, ammonia, acetonitrile, sinigrin, L-ascorbic acid, MES, BSA, Mueller Hinton Broth No. 2, 9-aminoacridine, AMP, ATP, glucose-6-phosphate, acetyl-CoA, TFA were all from Sigma-Aldrich and supplied via MERCK spol. S.r.o., (Bratislava, Slovakia); peptone for bacteriology, agar (Biolife Italiana, Milano, Italy). Unless otherwise noted in the text, all chemicals were from MERCK and were of analytical grade.
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