Possibly convert all transfusion blood Type O

UnanimousCoward writes: The BBC has an article that talks about a submission to Nature Biotechnology (not the current issue) in which scientists claim to have discovered a technique to convert all blood into Type O with the discovery of an enzyme that can strip the A and B antigens. This has implications to transform the stored blood supply into transfusable blood for all. It does not address the RH negative issue, though.