Dr Sarah Russell: Head, Immune Signalling Laboratory, has a background in immune cell signalling, particularly T-cell development and function, cytokine and surface receptor signalling. Her research interest is in the control of cell fate determination and leukemogenesis by polarity, asymmetric cell division and the tumour suppressor proteins of the Scribble family; she has expertise in microscopy, particularly time lapse microscopy, quantitative image analysis and super-resolution microscopy.