>tr|A7Y1W2|A7Y1W2_ECOLX LTB OS=Escherichia coli GN=eltB
MNKVKFYVLFTALLSSLCAHGAPQSITELCSEYHNTQIYTINDKILSYTESMAGKREMVI
ITFKSGATFQVEVPGSQHIDSQKKAIERMKDTLRITYLTETKIDKLCVWNNKTPNSIAAI
SMEN