The OEPCR method uses a small amount of the gene encoding the monomeric ELP unit and leads to the amplification of this segment to a great extent. This amplification is due to the fact that the initial segment added to the reaction functions as a template, from which identical gene segments can be synthesized.  The process will result in the production of double-stranded DNA encoding the ELP of interest.  One major bottleneck associated with this method is the potentially low fidelity associated with the Taq polymerase used. This might lead to replication from the template in which the wrong nucleotides are incorporated into the growing DNA strand.