Therefore, to determine whether myosin Vb protein is involved in the localisation of Rab11a, we compared small intestine samples from a microvillus atrophy patient and a healthy individual (Fig. 6C), as microvillus atrophy patients are known to have mutations in the myosin Vb gene (Müller et al., 2008). The gene discussed is RAB11A; the disease is Atrophy.