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Objective  The aim of the present study is to optimize the PCR conditions required to amplify the promoter sequence of an amino acid transporter having an AT-rich base composition with a high number of tandem repeats.    Result  Results show that successful amplification can be achieved by performing a 2-step PCR at a lower extension temperature of 65 °C for an increased extension period of 1.5 min/kb, with MgCl 2  concentration ranging from 2.5 to 3.0 mM. The results also suggest that the DNA concentration of about 25–30 ng/µl was essential to achieve this amplification.

bmc research notes

Optimization of PCR conditions for amplifying an AT-rich amino acid transporter promoter sequence with high number of tandem repeats from Arabidopsis thaliana