Additional file 4: of Establishment of high reciprocal connectivity between clonal cortical neurons is regulated by the Dnmt3b DNA methyltransferase and clustered protocadherins

Figure S4. Synaptic connections in wild-type nonchimeric mice. (A) Representative average (n = 20) traces of presynaptic spikes (pre) and resultant excitatory postsynaptic currents (post) between layer 4 neuron pairs with a one-way (upper) or reciprocal (lower) connection in wild-type nonchimeric mice (C57BL/6 mice) at P18–20. (B) Percentage of neuron pairs with synaptic connections. There was no significant difference in the connectivity between the neuron pairs in wild-type nonchimeric mice and the nonclonal neuron pairs in wild-type chimeric mice at the same age (P > 0.17, χ2 test). Numbers of recorded pairs are indicated on the bars. (PDF 575 kb