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2.A.54.1.9
Sideroflexin4, SFXN4, of 479 aas and possibly 7 TMSs in a 1 + 2 + 2 + 2 TMS arrangement, is important for mitochondrial function.  Macrocytic anemia and mitochondriopathy result from a defect in SFXN4in humans (Hildick-Smith et al. 2013).  

Accession Number:XP_014742247.1
Protein Name:XP_014742247.1 PREDICTED: LOW QUALITY PROTEIN: sideroflexin-4 [Sturnus vulgaris]
Length:480
Molecular Weight:
Species:Sturnus vulgaris [9172]
Number of TMSs:7
Substrate

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	MNFNFVWEMF LPAGPRHPDL HLAGPSPPSA IPRRTRGILR CPAPRLCLPG EAAGKGKAVG 
61:	PGLPRGKPLE RERPWGLAFP RDAAGKGKAV GPGLPRGKPL ERAPEPRRGS SVPGRSVQPR 
121:	TGPAGTSGAS APXDVNLRYW RAEGQSFFQR FLLWADALDP LLLLKSSNEI KTTRLFIQIN 
181:	EKTLNERVQN NQTKQAFLLS LSSVHPDTDK IIPVLFRPPA FMPITLPLVV VSSVQRQAKR 
241:	SFFWQVIASS FYFYRSSSLN PEFNFSYNLL FLQFVFHTYT TAFALINGNG TPKSEEYSLR 
301:	QKQIFLGLGA ISYSACVGAL PLAFMNRYAL KSPLMQLFVK KLLPAPLLGL TSAFTVAMVR 
361:	SPEFDNGIEV MDRNGKVIGV SKKAGEKAVM ETALSRAVLF GTTFFLPEVL MYFVQRARLV 
421:	KNPRALGPVR MFMVMSVLAG MLPVSFSMFP QCGEIKRADL EPEILSSTEE TEFFYNRGI