Thanks a lot for your help.

The symbol " > " was not a greater than symbol though, it is the start of the record in the file: >gi|2827179|gb|AF035737.1|AF035737........etc I was not aware that the prototypes were also causing a problem. Will have to sort that out. thanks.

MonkPaul.

In reply to Re: RegExpression fails to work by MonkPaul
in thread RegExpression fails to work by MonkPaul

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