Fig. 1From: Optimization of PCR conditions for amplifying an AT-rich amino acid transporter promoter sequence with high number of tandem repeats from Arabidopsis thaliana Amino acid transporter (AT2G40420) promoter region (1781 bp). The sequence and position of 28 bp long tandem repeat, occurring 15.5 times in the promoter region from − 503 to − 942 and the translation start site ATG, are depicted in the figureBack to article page