The length of spacer between the promoter and ORF

Question

[sunyeping]

Dear all,

I am trying to construct a plasmid vector that contains a vaccinia virus protomer (p7.5, p11, etc.) and a marker gene (GFP, mcherry, etc.). I can find the sequences of the promoter. For example, the sequence of the p7.5 is

5'-TAAAAGTAGAAAATATATTCTAATTTATTGCAC-3’[J. Mol. Biol. (1989) 210, 749-769]

but what should be the length and the sequence of the marker gene?

Thank you in advance!