Equilibrium shapes of a nematic membrane with varying concentration of the nematic field (NF = 0.1N−0.7N), for a prescribed value of the directional curvature, (Reprinted from Biophysical Journal, 104(5), N. Ramakrishnan, P. B. Sunil Kumar, John H. Ipsen, Membrane-Mediated Aggregation of Curvature-Inducing Nematogens and Membrane Tubulation, 1018–1028, Copyright (2013), with permission from Elsevier).