Table 1. Minimum inhibitory concentrations (MIC) of crystallomycins 1 and 2 against Gram-positive bacteria, μg mL^–1.

Microorganism	Antimicrobial a
	Cub	1(Ca2+)	1	2(Ca2+)	2
S. aureus ATCC 29213	0.5	4	16	2	4–8
MRSA 86	1	4	16	2	8
MRSA 88	0.5–1	4	16	2	8
MRSA 71001	0.5–1	4	16	2	8
MRSA 20450	1	2	16	1–2	8
MRSA 17	2	4	nd b	4	8
S. epidermidis C2001 (MR)	1	4	16	2	4–8
S. epidermidis 004-T1 (MR)	1	4	32	4	16
S. epidermidis 20459 (MR)	1	4	nd	4	nd
E. faecalis ATCC 29212	4	8	nd	8	16
E. gallinarum VP4147	8	4–8	nd	4–8	16

^aCub – cubicin (daptomycin); (Ca²⁺) – in the presence of calcium ions (1.25 mM).

^bnd – not determined.