Figure 4From: Evolutionary relationships of ATP-Binding Cassette (ABC) uptake portersHydropathy plot of the BtuC (TC# 3.A.1.13.1) vitamin B 12 transport protein. The topological prediction was performed with the WHAT program. Blue lines denote Hydropathy; Red lines denote Amphipathicity; Orange bars mark transmembrane segments as predicted by HMMTOP.Back to article page