distribution of genomic dna's

http://www.nbrc.nite.go.jp/e/gdna-e.html

The microbial genomic DNA supplied by NBRC is checked by the following quality verification procedure.
i)
Quantity
The quantity (over 1µg) is checked by spectrophotometry.
ii)
Suitability for enzyme reaction
The suitability for enzyme reaction is checked by the PCR.
iii)
Sequencing of the 16S rDNA
The full-region of 16S rDNA is sequenced.
iv)
DNA Length
The average length (over 20kbp) is checked by pulse field gel electrophoresis (PFGE).