Table 1.

Measuring the purity of plasmids obtained from plasmid repositories.

Plasmid	AbR	Size	Rep. origin	Copy no.	Ratio of correct restriction pattern a
Plasmid 27	Km	14.4 kb	IncP	High	9:10
Plasmid 44	Km	11.3 kb	ColE1	High	8:10
Plasmid 45	Km	8.6 kb	ColE1	High	0:10
Plasmid 46	Km	6.8 kb	ColE1	High	10:10

AbR, antibiotic resistance; Km, Kanamycin.

^a

Restriction digestion of plasmid preparations made by culturing 10 colonies obtained after plating the respective stab culture.