. 2013 Feb 16;69(Pt 3):432–441. doi: 10.1107/S0907444912049268

Table 2. Covalent adducts formed by Ldt_Mt2 from M. tuberculosis with the -lactam-type antibiotics imipenem and ampicillin.

Protein construct, molecular mass (Da)	-Lactam, molecular mass (Da)	Detected mass (Da)	Mass difference (Da)
Ldt_Mt2 periplasmic segment (34408), 40074.0	Imipenem, 299.3	40374.6	300.6
Ldt_Mt2 BC module (149408), 28482.0	Imipenem, 299.3	28780.9	298.9
Ldt_Mt2 BC module (149408), 28482.0	Ampicillin, 349.4	28831.7	349.7

Table 2. Covalent adducts formed by LdtMt2 from M. tuberculosis with the -lactam-type antibiotics imipenem and ampicillin.