# What is the meaning of letter 'c' in tblastn results before genomic sequence position?

An example of a result. So far I have been unable to find the answer on my own.

">CP000000.0:c2005000-2006000 Escherichia coli strain XYZ chromosome

ATG..."

• Please provide more details. Without context this could mean anything or nothing. Nov 27 '20 at 7:41
• What more context should I give? I have the amino acid sequence of a protein and I want to find its genomic sequence in all available strains of a certain bacterium. I have tblastn hit results in .txt format. As I understand after the accession number there is a colon and after it numbers signifying genomic position of hit sequence. In some cases, however, after the colon there is the letter 'c' and I have no clue what that means. Nov 27 '20 at 10:00
• The c is from the database itself, so one would need to know exactly WHAT you're blasting against. Nov 27 '20 at 14:06