sentences:  This polypeptide has been characterized to be the RNA-dependent RNA polymerase (RdRp) and the VpG.This polypeptide is 977 amino acids in length, making it the largest encoded RdRp in the "Birnaviridae" family.The RdRp contains a consensus GTP-binding site and is thought to contain self-guanylylation activity, making it consistent with the "Birnaviridae" RdRp capacity.