Which Method Allows a Researcher to Find a Gene Based

Question

Which method allows a researcher to find a gene based upon the protein that it encodes?
A)Co-immunoprecipitation
B)Phage display
C)RT-PCR
D)Intein trapping

Accepted Answer

Phage display is a technique that allows researchers to study protein interactions by displaying proteins (or peptides) on the surface of a bacteriophage. If the protein of interest is known, libraries of DNA sequences can be screened to find the gene that encodes for the interacting protein or the protein of interest itself. This method is particularly useful for identifying the gene based on the protein it encodes because it allows for the direct selection of peptides or proteins that bind to a specific target, which can then be used to identify the corresponding gene.