CCS and myxoma: Genbank accession numbers are as follows: bovine SOD—NP 777040.1, LSDV Nl-2490—NP_150565.1, Neethling vaccine LW 1959—AAN02856.1, Herbivac—QBF55608.1, myxoma—NP_051845.1, sheeppox—NP_659703.1, Amsacta moorei—NP_065037.1, vaccinia A45R—YP 233053.1, residues 71–235 of human CCS—6FP6_B and human SOD—NP_000445.1.