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3.A.1.11.10
The 3-component polyamine uptake transporter, PotABD. Transports homospermidine and possibly other polyamines. Inactivation of the potADB gene cluster (potADB) disrupted diazotrophic growth, clearly suggesting the importance of polyamine homeostasis in Anabaena. (Burnat et al. 2018). 

Accession Number:Q3MAR7
Protein Name:Binding-protein-dependent transport systems inner membrane component
Length:297
Molecular Weight:32573.00
Species:Anabaena variabilis (strain ATCC 29413 / PCC 7937) [240292]
Number of TMSs:6
Location1 / Topology2 / Orientation3: Cell membrane1 / Multi-pass membrane protein2
Substrate

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	MNTEIRDTPD DLANIQKLNR RKLNLIQPLA LLAPSGIWLL LLLVLPTLII FQLSLVPNIR 
61:	PGDIVNPSGL DNYVRILDPL YLQVILRSLW LALGTMAICL ILGFPVAYWI AQIAPQRWRN 
121:	LLVIGFVLPL WTSSLLRSYA WITILRPTGL LNSLLNSIGL PTLELLNRTP AVLIGMSYSL 
181:	LPYMVLILYA SLEKLDKRLL EAAADLGASP VKAFWKVTVP QISPGITAGS LLVLITALGD 
241:	FIDPELLGGA SSMTAARLVY NQFLGVTQNW GFGSALSMTL ILAVSIAIAL LIKFGDR