GC chromatogram showing utilization of oleic acid in presence and absence of methanol over a period of 72 h. Arti Kumari Rani Gupta 10.1371/journal.pone.0104272.g005 https://plos.figshare.com/articles/figure/_GC_chromatogram_showing_utilization_of_oleic_acid_in_presence_and_absence_of_methanol_over_a_period_of_72_h_/1155741 <p>Peak area at 17.5 min corresponds to residual oleic acid in the medium.</p> 2014-08-29 02:58:03 carbon source lipase Lip 11 Pichia pastoris X 33 release methanol source Slow Release Methanol Source peroxisome proliferation studies transmission electron microscopy 120 h Lip C methanol induction AOX 1 promoter methyl esters