The parasitic lifestyle of an archaeal symbiont by Hamm, JN, Liao, Y, von Kügelgen, A, Dombrowski, N, Landers, E, Brownlee, C, Johansson, EMV, Whan, RM, Baker, MAB, Baum, B, Bharat, TAM, Duggin, IG, Spang, A, Cavicchioli, R