N. Kumar Varshney, Ramasamy, S., Brannigan, J. A., Wilkinson, A. J., and Suresh, C. G., ?Cloning, overexpression, crystallization and preliminary X-ray crystallographic analysis of a slow-processing mutant of penicillin G acylase from Kluyvera citrophila?, Acta Crystallographica Section F-Structural Biology and Crystallization Communications, vol. 69, no. 8, pp. 925-929, 2013.

D.  Chand, Varshney, N. K., Ramasamy, S., Panigrahi, P., Brannigan, J. A., Wilkinson, A. J., and Suresh, C. G., ?Structure mediation in substrate binding and post-translational processing of penicillin acylases: Information from mutant structures of Kluyvera citrophila penicillin G acylase?, Protein Science, vol. 24, no. 10, pp. 1660-1670, 2015.