I tried to follow the instructions on the virtual lab in the link: http://www.com/biosci/genbio/virtual_labs/BL_26/BL_26.html .

Hi. I tried to follow the instructions on the virtual lab in the link: http://www.mhhe.com/biosci/genbio/virtual_labs/BL_26/BL_26.html. I am not able to figure out how to do the sequences correctly by following the mutation rules. For example, the mutation rule that says "delete the 2nd C," the mutated sequence was given, but not the original sequence. So, I did the original sequence the same as the mutated sequence, but I just removed the 2nd C, so there was a gap there. I put the same amino acids, too. However, whenever I click on "check" it says I am wrong every time. I am not able to figure out how to do the lab correctly. Can you please help me? Thank you.