Table 2. GC content and codon adaptation index (CAI) of 8 codons immediately downstream the start codon .

ORF	Nucleotide sequences	GC content	CAI
hG-CSF1	ACC CCG CTT GGC CCT GCG AGC AGC	75%	0.695
hG-CSF2	ACA CCA CTT GGC CCA GCA AGC TCC	62.5%	0.462
hG-CSF3	ACA CCA CTT GGC CCT GCA TCA TCT	54.2%	0.418