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2.A.63.2.1
The Na+:H+ antiporter, MrpA-G complex. Catalyzes Na+:H+ and Li+:H+ antiport. The MrpB subunit may have this transport activity by itself (Fukaya et al., 2009).

Accession Number:C7G3J4
Protein Name:Multiple resistance and pH regulation
Length:93
Molecular Weight:10371.00
Species:Aphanothece halophytica [72020]
Number of TMSs:3
Location1 / Topology2 / Orientation3: Cell membrane1 / Multi-pass membrane protein2
Substrate lithium(1+), sodium(1+), hydron

Cross database links:

Pfam: PF03334   

Gene Ontology

GO:0005451 F:monovalent cation:hydrogen antiporter activity
GO:0015992 P:proton transport

References (1)

[1] “An Mrp-like cluster in the halotolerant cyanobacterium Aphanothece halophytica functions as a Na+/H+ antiporter.”  Fukaya F.et.al.   19700555

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence 
1:	MINLLSYSLI LIGIIFWFWG TLPLIGNRSV LFKLHSLSVA DTLGSMSIVI GLLLKIPEEW 
61:	PLLLLAIISL AIWNTVLGYV IAYCSSDERH ENG