Re^3: replace fist and last occurrences of N

[linuxer]

Ok, what about newlines? Are there newlines in your datafiles? Or are they just one long string consisting of character class [a-zA-Z]?

update:
I know that for DNA information the character class can be much smaller ;o))

[ini2005]

yes, there are new lines
the files looks exactly like in your example (DATA)
thses are dna files of whole genomes and they are quite large....

update
and, it might also be capital N not just n