Sequence Cluster id id2 desc organism isHeteromeric 1 Singleton1 TCDB::Q7SCU1 2.A.1.1.82 The cellobiose/cellodextrin transporter, Cdt-1 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) 2 Singleton2 TCDB::Q7SD12 2.A.1.1.83 The cellobiose/cellodextrin transporter, Cdt-2. It functions by facilitated diffusion and functions with low efficiency, but mutations can increase its activity very substantially (Lian et al. 2014). It appears to be capable of catalyzing efflux of 2'-fucosyllactose (2'FL), the most abundant oligosaccharide in human breast milk, following genetic engineering Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987)