mouse genotyping by the three-primer multiple PCR. However, both of the smaller PCR products of 1068 (specific for the wild-type allele of mGluR4) and 1170 bp (specific for the mGluR4 transgene) were visible. Thus, all three allele combinations were clearly distinguishable on agarose gels stained with ethidium bromide. DNA from wildtype mice give a single smaller band (1068 bp; see Figure 2B, l...