Abstract
Amylase gene (ALP1) insertion in YCp 50 cloning vector was detected by Direct Screening PCR. Result of Direct Screening PCR showed one transformants which assumed have amylase gene insert. Characterization of the recombinant DNA by Stu1 and EcoR1 restriction enzymes indicated nucleotide sequence of insert gene. Digestion by BamHI, Cla1, and EcoRV restriction enzymes showed only one band that assumed size of insert gene is about 1500 bp. Gene expression showed that amylase enzyme activity by using Somogyi-Nelson method was 88.0265 Unit. This activity was 10 percent higher than transformant control (Escherichia coli DH5a which content YCp50).