Please note that DNA sample quality also plays a role in the resulting titer. DNA with high levels of contaminants may yield lower titer than those expected for your particular vector.

Our preps with vectors smaller than 8 kb yield 107 infectious units per mL. Vectors approximately 12 kb in size yield 105 infectious units per mL.

Titration requires that your submitted vector DNA contains a fluorescent marker. If your vectors do not have fluorescent markers, they will not be titered.

Viral titer is quantified by flow cytometry in units of infectious particles per milliliter (IU/mL). We infect suspension 293 cells and measure their expression of fluorescent markers as a readout for titer.