What is the fine-grained topic of the following text: BIgG-SAP mouse is a biotinylated normal mouse IgG mixed with Streptavidin-ZAP in the identical manner as other bonded conjugates, to give a definitive baseline for comparison to the activity of targeted toxins from the BETA product pipeline as well as others. Only return the topic.
BIgG-SAP mouse as a baseline for comparison in targeted toxins activity