when peptone was used. In addition, the fermentation with
peptone at pH 6.5 did not produce the usual red pigments
(Fig. 4A, line 9, a and b) while pigments characterized by a dark
red color remained at the loading point (Fig. 4A, line 9),
indicating that a few highly polar red pigments derivatives were
present. Similarly, the extracellular pigments obtained by
fermentation with peptone remained at the loading point
(Fig. 4A, line 10) and showed dark red color, indicating that they
mainly consisted of red pigments derivative