Fig. 2
From: Construction of Escherichia coli cell factories for crocin biosynthesis
The analysis of fermentation products of the engineered strains by HPLC. peak 1: Crocin (tR = 2.00 min); peak 2: Crocetin (tR = 25.32 min); peak 3 and 5: Crocetin dialdehyde (tR = 27.05 min); peak 4: Zeaxanthin (tR = 33.30 min); tR: Retention time. a From top to bottom were Saffron extract, YL4(pCsZCD-UGT94E5-UGT75L6), YL4(pCaCCD2-UGT94E5-UGT75L6), YL4(pCsCCD2-UGT94E5-UGT75L6) and YL4. b From top to bottom were YL4(pCsCCD2-UGT94E5-UGT75L6, pTrc-ALD6), YL4(pCsCCD2-UGT94E5-UGT75L6, pTrc-ALD9), YL4(pCsCCD2-UGT94E5-UGT75L6, pTrc-ALD8), YL4(pCsCCD2-UGT94E5-UGT75L6, pTrc-ALD3) and Crocetin standard