2.2.1. Primer design and gfp fragments amplified
Primers were designed according to the gfp gene search from
NCBI and the multiple cloning site of PBC-hygro using Software Primer 5.0. Restriction enzyme sites were added to primer
GFPup1 and Down1. The gfp gene was amplified from pEG-FP by PCR using the primer GFPup1: GGGAAGCTTAG
TGCTGAAACCTCCGTAT (contain HindIII enzyme site)
and GFPdown1: GGCGAATTCCACCTTGATGCCG (con-taining ECOlI enzyme site).
PCR was performed in 50ll volume of 10·buffer 2ll,
dNTP 0.6ll (10 mM), Taq 0.5ll(5U/ll), primers 1.5ll
(10lmol), DNA 0.5ll, and ddH2O 45.4ll. The cycling
parameters were as follows: DNA denaturation at 94C
3 min; at 94C for 30 s, at 52C for 60 s, at 72C for 60 s,
run for 35 cycles; and the final extension step was performed
at 72C for 10 min.