>tr|Q747U3|Q747U3_GEOSL Type VI secretion system needle sheath protein TssB OS=Geobacter sulfurreducens (strain ATCC 51573 / DSM 12127 / PCA) GN=tssB PE=4 SV=1 MSNEASVAPKERVNIVYRPADGEGREEVELPLKILVLGDFTGQPDERPVEKRDPVPVDKENFSEVMKAQRIMLNIAVSNR LYDAPDEELPVKLKMESLRDFGPEAIVEQVPEMKRLLELREALRALKAPLSNIPDFRRKIQELVTDDAARAKLLAEIGIE G