Fig. 6
From: Bioconversion of ferulic acid to vanillic acid by Paenibacillus lactis SAMS-2001
Stack plot of HPLC chromatogram at 310 nm showing the in vitro conversion of vanillin (1) into vanillic acid (2) by a cell extract of Paenibacillus lactis SAMS-2001. Chromatogram [a] represents vanillin (1) and vanillic acid (2) as standards. Chromatogram [b], [c], and [d] represent a decrease in the level of vanillin (1) with formation of vanillic acid (2) in the presence of NAD+ in the reaction mixture on 0, first, and third h of incubation, respectively