thanks...this is really quick! it was really the missing "my" that did me in. is there a quick way to tabulate all the respective transitions? e.g. 
A:T = 234
A:G = 492
A:C = 273
T:A = 400
...

[download]
and so on... basically output the total number of each type of transition?

In reply to Re^6: mismatching characters in dna sequence by prbndr
in thread mismatching characters in dna sequence by prbndr

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