Need some more information. How would these hashes be handled?

%hash= (  Group1 => 'ATG1,ATG2,ATG4,ATRG7',
        Group2 => 'ATG1,ATG9',
        Group3 => 'FYCO1,LSM2',
        Group4 => 'ATG4,ABC'
        );
[download]

%hash= (  Group1 => 'ATG1,ATG2,ATG4,ATRG7',
        Group2 => 'ATG1,ATG9',
        Group3 => 'FYCO1,LSM2',
        Group4 => 'ATG4,LSM2'
        );
[download]