1 23 The Protein Journal ISSN 1572-3887 Volume 36 Number 3 Protein J (2017) 36:220-227 DOI 10.1007/s10930-017-9713-2 A Tyrosine Residue Along with a Glutamic Acid of the Omega-Like Loop Governs the Beta-Lactamase Activity of MSMEG_4455 in Mycobacterium smegmatis Ankita Bansal, Debasish Kar, Satya Deo Pandey, Ashok Matcha, N. Ganesh Kumar, Soshina Nathan & Anindya S. Ghosh