Dear JohnGG, Thank you very much for your time and suggestions. It feels good to learn alternate ways to code for the same input. I have another question to ask regarding generating multiple strings from a general rule. I am trying to generate a string of 10 bases based on certain rule:C)2N3(A|G)4-6N7T8(A|T)9(A|T)10 where N could be (A or T or G or C). So according to the above rule, 1st and 2nd position could be a combination of (GG or GC or CG or CC) followed by (A or T or G or C) at position 3 followed by a combination of (AAA or AAG or AGG .. and so on). The thing which I am not able to figure out is do I need to put lot of loops to do it or is there any short way using perl. Thank you for any help or suggestions.

In reply to Re^4: Comparing array of aligned sequences by newtoperlprog
in thread Comparing array of aligned sequences by newtoperlprog

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