C CHEMISTRY; METALLURGY
C12 BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
C12N MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
C12N15/00 Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
C12N15/09 Recombinant DNA-technology
C12N15/10 Processes for the isolation, preparation or purification of DNA or RNA
C12N15/1034 Isolating an individual clone by screening libraries
C12N15/1037 Screening libraries presented on the surface of microorganisms, e.g. phage display, E. coli display