Differential expression of two isolates of beak and feather disease virus capsid protein in Escherichia coli

► Expression of two isolates of BFDV capsid protein in Escherichia coli. ► Optimization of purification buffers improve recombinant protein yield. ► Amino acid sequence affects recombinant protein solubility. ► Produced a higher concentration of BFDV capsid protein than previously reported.