peripheral blood samples. Genotyping was performed using
Allele specific polymerase chain reaction (AS-PCR) methods
(10 ). We used primers from the previous study (11 (link)) and the
sequence of four primers (synthesis by metabion international
AG, Germany) was shown as follows:
Arginine-based (G) allele:
F: 5´-TCCCCCTTGCCGTCCCAA-3´
R: 5´-CTGGTGCAGGGGCCACGC-3´
Proline-based (C) allele:
F: 5´-GCCAGAGGCTGCTCCCCC-3´
R: 5´-CGTGCAAGTCACAGACTT-3´
PCR was done in a final volume of 10 μl reaction for each
allele containing: Taq DNA Polymerase 2x Master Mix
RED (Ampliqon, Denmark), 1 μl genomic DNA (200-300
ng), 1 μl of each primer (10 μM, Metabion International
AG, Germany) and adequate DNase free water (Sinaclon,
Iran). Amplification temperature stages were performed
for 5 minutes at 95˚C and then 35 cycles including 30
seconds at 94˚C, 30 seconds at 63˚C, 30 seconds at 72˚C,
followed by 7 minutes at 72˚C in a Veriti 96 well PCR
Thermal Cycler (Thermo Fisher Scientific).