The human STAT1 coding sequence was cloned using reverse transcription PCR. The sequence of primer, forward: 5’-TTAAGCTTGGTACCGAGCTCGCCACCATGTCTCAGTGGTACG-3’; reverse: 5’-CCCTTGCTCACCATGGATCCGCTTCCCCCTCCTCCTACTGTGTTCATCATACTG
TCGAAT-3’. PCR products were ligated into the pcDNA3.1 vector between the kpnI and BamHI restriction sites using ClonExpress II One Step Cloning Kit (Vazyme, China). Mutations were introduced using Mut Express II Fast Mutagenesis Kit V2 (Vazyme, China) following the manufacturer’s instructions. Flag and GFP were tagged at the C-terminus of the expression plasmid. The constructed plasmids were verified by sequencing.
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