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1.A.43.1.17
Fluoride ion channel of 128 aas and 4 TMSs, Fluc or CrcB.  The crystal structure is known (PDB5A40; 5A43).

Accession Number:Q7VYU0
Protein Name:Putative fluoride ion transporter CrcB
Length:128
Molecular Weight:13339.00
Species:Bordetella pertussis (strain Tohama I / ATCC BAA-589 / NCTC 13251) [257313]
Number of TMSs:4
Location1 / Topology2 / Orientation3: Cell inner membrane1 / Multi-pass membrane protein2
Substrate fluoride ions

Cross database links:

Structure:
5a40   5NKQ   6BQO     

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	MLTYAPLNFI AIGIGATLGA WLRWVLGLRL NGAGWPWGTL TANLVGGYLI GVMVALIASH 
61:	PEWPAWIRLA AVTGFLGGLT TFSTFSAETV DMLERGVYAT AAAYAGASLA GSLAMTGLGL 
121:	ATVRLLLR