Proteins reside in either the cell plasma or in the
cell membrane. A membrane protein goes through the
membrane at least once. Given the amino acid sequence of a
membrane protein, the tool
'PureseqTM' (< https://github.com/PureseqTM/pureseqTM_package>,
as described in "Efficient And Accurate Prediction Of Transmembrane
Topology From Amino acid sequence only.", Wang, Qing, et al (2019),