During stationary phase, when PDB is used as the carbon substrate, the content of
triacylglycerols (16.9 mg) accounted for 65% o f the total lipids produced (Table 10). The
sterol content was almost absent during the exponential phase but it increased to 2 mg
during the stationary phase (Table 10). In addition diacylglycerol were also detected in
small amounts (0.3 mg) only during the stationary phase.