Transformation of a competent bacterium (a-) by donor DNA (a+)

Double-stranded Retipiem donor DNA chromosome 0 Donor DNA binds at the receptor site. One strand is degraded as it enters the recipient cell. av-;-. ({ooonbaao noegooaoo DNA-binding complex at A receptor DNA-degrading enzyme Recipient Cytoplasmic cell wall membrane a The transforming strand pairs with the homologous region of the recipient chromosome. Transforming strand Heteroduplex 1 DNA a The transforming strand displaces a recipient strand, forming complementary heteroduplex DNA (a‘la'). The excess strand degrades. DNA replication and cell division Nontransformant Transformant 0 DNA replication and cell division produce one transformant and one nontransformant.