Fig. 4From: A simple, efficient and rapid HPLC–UV method for the detection of 5-HT in RIN-14B cell extract and cell culture medium5-HT synthesis and secretion by RIN-14B cells. Chromatograms of FBS free 1640 medium sample (a), cell extract sample (b), FBS free 1640 medium sample in which RIN-14B were cultured for 24 h (c), and 5-HT standard sample (d)Back to article page