【求助】请教枯草杆菌的转化方法
Transformation of B. subtilis
Transformation of B. subtilis cells was conducted by the following procedure (4, 224):
the B. subtilis culture was grown in Paris-Medium until it reached a cell density of
OD580 = 1. The culture was divided into 0.5 mL aliquots, plasmid DNA (0.1-1 μg) was
added and the samples were incubated for 1-3 hours at 37°C. Selection for plasmid
bearing Bacillus cells was provided on LB-agar plates containing the suitable
antibiotic. For efficient DNA uptake of pBSMuL vectors by B. subtilis, the plasmid
DNA was SacI digested and self-ligated to generate plasmid multimers before adding
to the competent cells.
Paris-medium: 60 mM K2HPO4, 40 mM KH2PO4, 3 mM Na3-citrate, 1% (w/v) glucose,
20 mM K-glutamate, 2,2 mg/L Fe(III)NH4-citrate, 0,1% (w/v) casamino acids, 20 mg/L
tryptophan, 3 mM MgSO4
请问Paris-medium中的 Fe(III)NH4-citrate和casamino acids分别是什么啊?casamino acids是水解酪蛋白复合物?
请问谁有枯草杆菌转化方面的资料吗?
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枯草杆菌 strong plasmid subtilis culture