function DNAr = reverse(DNA)
DNA = {upper(char(DNA))};
DNAr = DNA;
DNAr{1}(find(DNA{1} == 'A')) = 'T';
DNAr{1}(find(DNA{1} == 'G')) = 'C';
DNAr{1}(find(DNA{1} == 'C')) = 'G';
DNAr{1}(find(DNA{1} == 'T')) = 'A';
DNAr = {fliplr(DNAr{1})};
