Hemoglobin, as you know, is an oxygen carrier and so red blood cells concentrate in bags of hemoglobin which circulate in your blood and they carry oxygen.

The hope is that modified adenovirus could play a role in gene therapy, used as a vector (carrier) for delivering therapeutic genes to the interior of cells.

Polymeric carrier containing folic acid is expected to be able to identify tumor surface receptors and transfect cells by receptor-mediated endocytosis.