“…To investigate the effects of culture conditions on the UPR, the following UPR-relevant marker genes in A. oryzae were selected to monitor their transcriptional levels during cultivation: (i) the hacA gene [Dogan ID, AO090124000074], encoding transcription activator HACA of the UPR, which is efficiently translated by splicing the unconventional intron of hacA mRNA, resulting in the mature form of HACA; 8,9) (ii) the bipA gene [Dogan ID, AO090003000257], encoding the BiP protein, a chaperone of the HSP70 class that plays an important role in UPR; 9,10) (iii) the pdi gene [Dogan ID, AO090001000733], which codes for a luminal ER enzyme that catalyses the mechanism of disulphide bond formation; 9,11) (iv) the ppi gene [Dogan ID, AO090023000811], which is capable of catalyzing the cis-trans isomerisation of a peptide bond on the N terminal side of proline residues in polypeptides; 9) (v) 18S rRNA [Dogan ID, AO090206r00001], a control of the non-stress responsive gene; (vi) the gpdA gene [Dogan ID, AO090011000414], which is used as endogenous control of the expression level in quantitative real-time PCR.…”