Mutagenesis repeated with modified conditions: fresh stock of dNTPs used and additional MgCl2 added.
Preparation of alpha+A construct
Antoni
PCR on pKS plasmid containing protein A with
AL+link10+homo2 and AP+NotI
primers (20 cycles, elongation duration 15 s, annealing temperature 72°C).
PCR on pUC19 plasmid with
AlphaL+SacI and AlphaP+link10+homo2
primers (20 cycles, elongation duration 45 s, annealing temperature 63°C).
As a result we got two PCR products (alpha-linker and linker-A) wich will be utilized as templates in next PCR.
Gel electrophoresis of PCR products and gel-out of proper bands (alpha_linker - 572 bp and linker_A - 467 bp ).
Measurment of concentration of both isolated products