| http://www.w3.org/ns/prov#value | - Generally speaking, advantageous processes of the invention can thus be conducted without the presence of polycationic or other agents which, in corresponding retroviral infection protocols (e.g. co-culture) without the fibronectin fragment or other material for co-localization, lead to an increase in transduction efficiency, but which agents reduce the transduction efficiency in the presence of t
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