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Transmission electron micrograph of S. aureus cells undergoing cell division. Completed division septa are indicated by a single arrowhead, and new division sites are marked by double arrowheads. Newly formed cell wall (W2) is distinguished from preexisting cell wall (W1). Also visible are the bacterial chromosome (Chr) and cytoplasmic membranous bodies (M). This electron micrograph was generated by P. Giesbrecht. Reprinted from reference 260 with permission of the publisher.
