Hello every one
I want to double digest p35S-FAST Plasmid with Kpn1 and BamH1 1X tango buffer.. The "Double Digest Calculator-Thermo Scientific" recommends the following condition.
1X Tango buffer
4-fold excess of KpnI
BamHI
Incubate at 37°C.
I want to know that what does it mean "4-fold excess of KpnI
BamHI".i.e In a total volume of 50ul reaction, the Kpn1 will be 4 fold in excess to BamH1 or BamH1 will be 4 fold in excess to Kpn1.?..
Also please suggest me that for double digestion i should use 50ul reaction volume or 20ul volume.?.
Please do not mind because the question is simple but i am really confused...