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. 2021 Apr 1;8:75. doi: 10.1038/s41438-021-00511-4

Fig. 7. Model describing the events leading to a shift in triterpene metabolism during suberization of the skin of the apple cultivar ‘Rugiada’, a mutational sport of ‘Golden Delicious’.

Fig. 7

The transcription factor MdMYB66 binds to a response element (RE) in the promotor region of MdOSC5, which induces the production of lupane-type triterpenes in russet skin as opposed to the ursane-type and oleanane-type dominating in smooth waxy skin. OSC, oxydosqualene cyclase; BAHD Acyl-transferase, hydroxycinnamoyl-CoA transferase; C-28 oxidase = Cytochrome P450 CYP716A15