Abstract
The technique of Cre-mediated DNA recombination at loxP sites has been used widely in manipulation of the genome in cultured cells and in living organisms. Local delivery of Cre recombinase protein tagged with a cell-penetrating (or permeable) peptide (Cre-CPP) has the advantage of additional spatial and temporal control when compared to genetic delivery methods. In this chapter, we describe protocols for injection-based intramuscular delivery of Cre-CPP dissolved in hydrogel to skeletal muscle and by ultrasound-guided injection to cardiac muscle in mice.
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