S. Graupner et W. Wackernagel, IDENTIFICATION OF MULTIPLE PLASMIDS RELEASED FROM RECOMBINANT GENOMESOF HANSENULA-POLYMORPHA BY TRANSFORMATION OF ESCHERICHIA-COLI, Applied and environmental microbiology, 62(5), 1996, pp. 1839-1841
Total DNAs isolated from two Hansenula polymorpha (Pichia angusta) str
ains having chromosomal single or tandem multiple integrations of a pU
C18-derived expression plasmid produced Escherichia coli transformants
which contained plasmids of different size and/or organization than t
hat of the expression plasmid. Evidence that plasmid-like structures a
re formed in H. polymorpha and that their formation is stimulated by D
NA damage is presented in this study.