Fig. 3From: Distinct expression and function of carotenoid metabolic genes and homoeologs in developing wheat grainsIn vitro activities of wheat CCD-A1 and CCD-A4 homoeologs. β-apo-8′-carotenal (β-apo; a, b), β-carotene (β-car; c-e), zeaxanthin (Zea; f-h), and lutein (Lut; i-k) were used as substrates in the enzyme assays. Product peaks are indicated by arrows. Absorption and mass spectra of the product peaks are shown in (l-p)Back to article page