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3.A.1.2.28
Riboflavin uptake ABC transporter, RfuABCD.  The periplasmic binding protein (RfuA) has been crystallized at 1.3 Å resolution with riboflavin bound (Deka et al. 2013). Similar systems are found in other spirochetes such as Treponema denticola, and Borrelia burgdorferi (Deka et al. 2013).

Accession Number:R9UW99
Protein Name:ABC superfamily ATP binding cassette transporter, membrane protein
Length:343
Molecular Weight:37882.00
Species:Treponema pallidum (strain Nichols) [243276]
Substrate riboflavin

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FASTA formatted sequence
1:	MNGAVCVLSA LIAVFTCFSC RPAVQDERAV RIAVFVPGFR HDSPVYAMLC DGVERAVTQE 
61:	RATGRSIGLD IIEAGPNQAL WREKLAHLAA EQRYRLIVSS NPALPHVLEP ILRQFPLQRF 
121:	LVLDAYAPQE HSLITFRYNQ WEQAYLAGHL SALVSASAMR FANADKKIGL IAGQSYPVMT 
181:	QTIIPAFLAG ARAVDPAFEV DVRVVGNWYD AAKSADLARI LFHEGVDVMM PICGGANQGV 
241:	LAAARELGFY VSWFDDNGYA RAPGYVVGSS VMEQERLAYE QTLRCIRGEL PSAGAWTLGV 
301:	KDGYVRFIEE DPLYLQTVPE PIRVRQSALL RRIQSGELTL PVR