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Sullenberger et al. dissect the centrosomal patterning of Plk4 during centriole duplication and amplification and the positioning of Plk4 and procentrioles in relation to mother centriole microtubules. They build a molecular map of Cep57, Cep63, Cep192, and Cep152 and investigate their requirements for Plk4 localization.

Pellegrino et al. show that Mtb infection triggers an increase in the number of peroxisomes and peroxisomal ROS in human macrophages. Macrophages lacking peroxisomes are unable to restrict Mtb infection due to a decreased source of ROS, uncovering a new role for peroxisomes in the host response.

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