Figure 6From: Loss of transforming growth factor-beta 2 leads to impairment of central synapse functionUltra-structural analysis of synapses in the brainstem of wild-type (WT) and transforming growth factor (TGF)-β2 knock-out (KO) mice at embryonic day 18.5. Synapses of WT and TGF-β2 KO neurons in the pre-Bötzinger-complex area exhibit presynaptic vesicles (asterisks), a synaptic cleft and a distinct postsynaptic density (arrowheads). Scale bar, 250 nm.Back to article page