Micro-injection of BH3 peptides induces mitochondrial fragmentation of <i>Bax<sup>−/−</sup>/Bak<sup>−/−</sup></i> MEFs.

<p>(A and B) Mitochondria of <i>Bax<sup>−/−</sup>/Bak<sup>−/−</sup></i> MEFs were stained with Mitotracker Red CMXRos (50 nM) followed by microinjection of 100 µM BID (A) or mutant BID peptide (B) that does not contain 8D-arginines. Injected cells were tracked by dextran FITC.</p>