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2.A.18.8.9
Small, semipolar, amino acid (Ser, Pro, Cys, Ala and Gly) uniporter, NEAAT of 463 aas and 9 - 12 TMSs.  It catalyzes electroneutral bidirectional amino acid exchange is response to amino acid concentration gradients (Feng et al. 2019). This transporter is present in thebacteriocyte (symbiosome) membrane which houses the symbiotic bacteria that produce the essential amino acids for the aphid.

Accession Number:J9K7T3
Protein Name:Aa_trans domain-containing protein
Length:463
Molecular Weight:51089.00
Species:Acyrthosiphon pisum (Pea aphid) [7029]
Number of TMSs:9
Substrate

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	MSESLSLTGI GPPSDTKDQK SKSYAVNVQQ ENMSLNANGS PPYDPHAHRI LEHPTTNSET 
61:	LIHLLKGSLG TGILAMPNAF YNSGLLVGTV GTILIGFLCT YCLHVLVRSQ YLLCKKHRVP 
121:	ILSYPDSMKY ALQDGPAFLK FGVPLSAIIV DGFLIVYQLG ICCVYIMFIG TSIKQVLDIY 
181:	IEPMNERYYM LMMLIPLVAI NLIRNLKLLA PFSQGANIIT FAGLAIVLWY IFVDLPPISS 
241:	RPLIGEPRNY TLFVGTTLFA LEAVGVVLAL ENNMKTPASF GGTTGVLNIG MTIITVMYVG 
301:	MGFFGYVKYG EIVEGSVTLN LPNGDILSQA VKLIFAVAIF ITYALQAYVP VEIIWNTYMK 
361:	KRVQNWDKTT MEYLLRISVV LVTFLLAVAI PLLDLFISLF GALCLSVLGI GFPALIEICV 
421:	LWPERNFGRF NYVLIKDIIL IIIGILALVL GTYISLQDIA RKL