I need to find the following pattern from a genomic sequence
B represents C, G, or T
N15 represents A, T, G or C and these four base combination should have the length of 15 bases.
To do the same, I tried
grep command, but I could not specify
N15 in the
grep command line. Therefore, please help me to find the same.
For example, I have a nucleotide sequences as follows
Thanks in advance.