TABLE 1.

Frequency of Mycobacterium tuberculosis (MTB) PPE18 protein variants among 225 MTB clinical strains isolated in Turkey and Arkansas, United States, and the length of the first modeled domain for each variant.

Variant	Variant frequency (%)	Domain 1 length
H37RV	79.11	179
AK1	2.22	179
AK2	1.33	179
AK3	1.78	179
AK4	0.89	179
AK5	0.44	179
AK6	0.44	179
AK7	0.44	179
AK8	0.44	179
AK9	0.44	179
AK10	0.44	179
AK11	0.89	161
AK12	0.44	179
AK13	0.44	179
AK14	0.44	179
AK15	0.44	181
AK16	0.44	179
AK17	0.44	179
AK18	0.44	177
AK19	0.44	154
AK20	0.44	179
AK21	0.44	179
TK1	2.22	179
TK2	0.44	179
TK3	0.89	179
TK4	0.89	179
TK5	0.89	179
TK6	0.44	179
TK7	0.44	180
TK8	0.44	179