ExTopoDB is a publicly accessible database of experimentally derived topological 
models of transmembrane proteins. It contains information collected from studies 
in the literature that report the use of biochemical methods for the 
determination of the topology of α-helical transmembrane proteins. Transmembrane 
protein topology is highly important in order to understand their function and 
ExTopoDB provides an up to date, complete and comprehensive dataset of 
experimentally determined topologies of α-helical transmembrane proteins. 
Topological information is combined with transmembrane topology prediction 
resulting in more reliable topological models.
AVAILABILITY: http://bioinformatics.biol.uoa.gr/ExTopoDB.