Complete sequences of CiLV-C2 MP from P12 plants at the second viral passage showed the presence of the wild type gene (MPWT) in 40% of clones (four out of ten colonies), but also nucleotide alteration leading to changes in deduced amino acid residues, resulting in the exchange of serine for phenylalanine either at position 72 (MPS72F) (30% of clones, three out of ten) or position 259 (MPS259F) (30% of clones, three out of ten), indicating the presence of a mix infection with at least three different MP gene versions (Figure 3). Here, C2 is linked to infection.