gelatin in PCR buffer

[Marcelo Carnier Dornelas]

Hi netters

        I've heard about using gelatin in PCR buffers. Is it so, or 
am I dreaming? Which concentration is courrently used? What is it for?
        Thanks for any comments.
        
                            Marcelo Carnier Dornelas
                            Department of Genetics
                            University of Sao Paulo
                            "Luiz de Queiroz" School of Agronomy