Figure 6 of
Yin, Mol Vis 2004;
Figure 6. M2 and M4 receptor mRNAs were present in chick retinal tissue
PCR amplification of chick retina cDNA (R) with chick M2 (A) and M4 (B) primer. An annealing temperature of 58 °C and 1.5 mM MgCl2 were used. DNA fragments of the expected size (340 and 229 bp with chick M2 and M4 primers, respectively) were observed. No fragments were observed in any of the negative controls (N).