Variant of the esxA gene from MDR-TB isolates was determined using PCR at the Institute of Tropical Disease, Surabaya, Indonesia. DNA isolation for the esxA examination was conducted using a
QiAmp DNA Kit (QIAGEN). The PCR solution consisted of the KAPA2G Fast Ready Mix PCR Kit as PCR Master Mix, a pair of LIC-ESAT-6 primers (R: 5'-GAG GAG AAG CCC GGT TGC CCT TTC GCT ATT CTA CG-3' and F: 5'-GAC GAC GAC AAG ATG ACA GAG CAG CAG TGG AAT-3'), nuclease-free water, and the DNA template.
The PCR product was sent to 1 st Base using an
ABI PRISM 3730 × l Genetic Analyzer. The sequence results were analyzed using GENETYX Ver. 10. The PCR product was sent to 1 st Base, Singapore for sequencing. Sequencing of the esxA gene was performed using an
ABI PRISM 3730 × l Genetic Analyzer with 96 capillaries developed by Applied Biosystems and a
Big Dye ® Terminator v3.1 Cycle Sequencing Kit.
[ 23 ]
Soedarsono S., Amin M., Tokunaga K., Yuliwulandari R., Suameitria Dewi D.N.S, & Mertaniasih N.M. (2020). Association of disease severity with toll-like receptor polymorphisms in multidrug-resistant tuberculosis patients. International journal of mycobacteriology, 9(4).