I us Allpath-LG to assembly a genome and I got "B" letter in fasta file as be low
TTAAACTTGAAATACCCTATCATCCAGGCCCCTATGGCGGGGGTCACGACTATTGAAATGGCCGCTAAGGCTTGTATTGC
GGGBGCCATAGCTTCACTACCCCTATCCCACTTAGACTTCAGAAAGGTCAATGATATTGAAAAGCTTAAACTGATGGTTT
CACAATTCAGAGATCAAGTAGCCGATGAATCTTTAGAGGGCAATCTCAACCTAAACTTTTTTTGCCATRATATCGTTGAT
What happen ?
TTAAACTTGAAATACCCTATCATCCAGGCCCCTATGGCGGGGGTCACGACTATTGAAATGGCCGCTAAGGCTTGTATTGC
GGGBGCCATAGCTTCACTACCCCTATCCCACTTAGACTTCAGAAAGGTCAATGATATTGAAAAGCTTAAACTGATGGTTT
CACAATTCAGAGATCAAGTAGCCGATGAATCTTTAGAGGGCAATCTCAACCTAAACTTTTTTTGCCATRATATCGTTGAT
What happen ?
![Confused](https://www.seqanswers.com/core/images/smilies/confused.png)
Comment