Table 2.

The properties, and potential uses, of the different helper plasmids created here are indicated

Helper plasmid	Form g3p	Phage production titer	Infectability of bacteria bearing plasmid	Notes	Potential use
M13cp	Full length	Equal M13K07	10% DH5αFT	Most similar to phage produced using standard helper phage	Transfer genetic material. Monovalent phage display.
M13cp-CT	Truncated	5−20% M13K07	Equal DH5αFT	Behaves more like g3p deletion. Only phagemid with recombinant g3p are infectious	Multivalent phage display
M13cp-dg3	Absent	0.1−10% M13K07	Equal DH5αFT	All phage produced have recombinant g3p	Multivalent phage display