Why anti-peptide antibodies?
We think that anti-peptide antibodies against carefully chosen peptides are more specific than antibodies generated from longer sequences (e.g. recombinant proteins or parts of whole proteins). For recombinant sequence parts of proteins you will never know if polyclonal antibodies are generated against epitopes that are located inside the natural folded protein. For peptides there are some algorithms that help to choose sequences that have a high potential to be located at the surface of the protein.