Construction of different βC1 promoters of MYVB. The satellite conserved region (SCR) and A-rich region are shown in boxes. The translation start site is numbered +1. (A) Schematic representation of the MYVB genome and various βC1 promoters. (B) The promoters were cloned into the pINT121 binary vector. (C) The promoter constructs were cloned into the pCHF3:GFP vector.