Fig. 6From: Time-resolved carotenoid profiling and transcriptomic analysis reveal mechanism of carotenogenesis for astaxanthin synthesis in the oleaginous green alga Chromochloris zofingiensisExpression validation of carotenogenic genes in C. zofingiensis under ND conditions as determined by qPCR. The transcript level was normalized to that of 0 h and expressed as log2 transformed value. The data are expressed as mean ± SD (n = 3). The primers used for qPCR were listed in Additional file 7: Table S1Back to article page