I was trying to BLAST a protein sequence today at the NCBI blast server
and in the results, part of my query sequence came up as a row of
XXXXXXXXs even though it is directly identical to a sequence in the
The "unBLASTable" part of the sequence is
I have also checked it using a different BLAST server with the same
Can anybody explain why the server can't / won't accept this sequence?
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