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2.A.31.2.16
Probable electroneutral Na+-driven bicarbonate transporter, NBC, of 1214 aas and 13 putative TMSs. It possibly functions by Cl- exchange as does the human ortholog (TC# 2.A.31.2.4). It is present in the flagellar plasma membrane (Gunaratne et al. 2006).

Accession Number:Q1A708
Protein Name:Anion exchange protein
Length:1214
Molecular Weight:135480.00
Species:Strongylocentrotus purpuratus (Purple sea urchin) [7668]
Number of TMSs:10
Location1 / Topology2 / Orientation3: 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:	MDESDVVVDQ GNYHSLREAD ESETSGHHAI YVGVHVPHNE EQQQKNHHHH HHKHRHKGKS 
61:	KKNGSSHSSA NNSSSTADAF FPNNDPDARP DALLLDKNGD ASQRVKFILG DEADDGHESH 
121:	EIFTEMEELC YGSDGEELEW KEMARWIKYE EDVDVDADRW SKPHVATLPL HSLFELRTCL 
181:	INGTVCLDME ADNIVQIADL VLDKLIMSEQ LDESKREQVR EALLRKHHHQ SHKKHRDKRG 
241:	SSLLPMIRSL TDIGRSLSQG GAHNTSMEQQ AAAQSGIQTS HGSSPNIQNS QTSPSSLMVK 
301:	GNSGDLGKSE TSGSLPKVSS HHSLKKRLSE ARLSIPHNLA GHSLSARHSF MRKIPQGAEA 
361:	SNVLIGEVDF LSRPIIAFVR LQSAVSLGDP TEVPIPRRFL FILLGPQSGE TKRYHEIGRC 
421:	VATIMSDKVF HDVAYKAKST KDLLAGIDEF IDSVTVLPPG AWDPNIRIEP PKVVPDQAKR 
481:	LSHFQTPNGH AEGIDEEDGG GGGGHNGEHE GLERTGKIFG GLIQDCKRRF PFYLSDFKDA 
541:	FHLQCLASFI FMYFACITPV ITFGGLLGEA TENRMSALEG LLGASICGVA FHLFSGQPLT 
601:	ILGSTGPILV YEKILFGFCK TQELDYLSFR FWIGLWTMVF CVILVATDAS SFVKYFTRFI 
661:	EESFSSLISF IFIYESVHKL MKIYKEYPVA RYANDNTTYE CMCQTATGLF EYDEKDFYTE 
721:	SKIDCDSLNG TLVGNWCGKH VPQSDIFFMS LILMLGTFTI AYSLKEFKTT GYFPTIIRTT 
781:	VSDFAVLIAV VIMVGVDRLF GVDTPKLLVP SEFKPTSDLR KGWFIHPFNG NGWWTVLAAI 
841:	IPALLATILV FMDQQITAVI VNRKENKFKK GLGYHLDLLV VAVMLGICSI MGLPWFVAAT 
901:	VLSINHVNSL RVESECKAPG ERPKIVGCRE QRVTGVMVFV MIGLATLMTK ILSYVPMPVL 
961:	YGVFLFMGIA SLKGVQFVDR LSLFFMPLKY QPDYIYLRHV GIKKVYLFTF IQLMCLVVPM 
1021:	GIKSTDAAIV FPIMVLGMVV VRKLMDYVFT KQEVMMLDDV MPEMTKRAKH DRKKKQEEEV 
1081:	AACEQIKNIP GRVQVPLSDG NMLSIPVDKV EFHPEVACIN IPEDMAKTGV WKALAKNAEG 
1141:	GQVVHRKPHG KEKSSSGGRP NLDLPTIPGS PRESSYLETQ RGSIQEVRIE VPEQFRRTPS 
1201:	PPPTHIGTDN ETSV