“…After, when SEC coupled to IEX was performed, it was possible to observe the same fraction (∼57 kDa protein) eluting at around 38.88 mL at a conductivity of 19.65 mS/cm without the fractions observed in the chromatograms of SEC and IEX performed separately, attributed to culture media components of Pichia pastoris during fermentation. Gamboa-Suasnavart et al deduced that it is not possible to elucidate if the change in some parameters of fluids during growth in bioreactors are the result of culture media composition, biomass, or morphology (Gamboa-Suasnavart et al, 2019). In order to study the N-glycosylation pattern of MRJP1, Pichia pastoris supernatant containing MRJP1 was deglycosylated using PNGase F. MRJP1 is a glycoprotein, with glycans at the N144 and N177 positions (Mandacaru et al, 2017), including a Galβ1-3Gal NAc unit.…”