Could someone please tell me how I can take a string of letters that is input and edit it to make sure there are now letters that are not appropriate.

Say someone enters: "TAZGCAACCCGGB"

I want to eliminate any letters other than A, C, G, or T. Then I want to print the sequence out in triplets with spaces in between in three letters: "TAG CAA CCC GG"

Thanking you in advance,

Little Shell

:D

Its so simple use instr,mid,replace fns in vb to get the output.
first learn those fns and apply ur logic

Thanks
Jelfy

Thank you Jelfy,

I didn't even know that those methods existed.

Best Regards,

Little Shell