Fig. 1.
Liquid chromatography-tandem mass spectrometry (LC-MS/MS) results of the extracts from Zooshikella rubidus S1-1 were compared to those from Zooshikella ganghwensis KCTC 12044T. (A) LC chromatogram of extracts from Zooshikella rubidus S1-1 (top) and Zooshikella ganghwensis KCTC 12044T (bottom). The major compounds were separated by HPLC at the indicated retention times of 7.08 min (m/z 322, cycloprodigiosin) and 7.86 min (m/z 324, prodigiosin). (B) Mass spectra (top) and MS/MS fragmentation patterns (bottom) of cycloprodigiosin (left) and prodigiosin (right). (C) Molecular structures of cycloprodigiosin (left) and prodigiosin (right) identified by the MS/MS fragmentation study.