Broom, A. ., Doxey, A. ., Lobsanov, Y. ., Berthin, L. ., Rose, D. ., Howell, P. ., McConkey, B. ., & Meiering, E. . (2012). Modular evolution and the origins of symmetry, reconstruction of a three-fold symmetric globular protein. Structure 20:161-171.