Morphology of photoreceptor synapses in wild-type and laminin β2 chain-deficient retinas
| Wild-type (n = 95) | β2 Chain-deficient (n = 219) | |||
|---|---|---|---|---|
| n | % | n | % | |
| Triads | 50 | 52.63 | 16 | 7.31 |
| Dyads | 40 | 42.11 | 107 | 48.86 |
| Floating ribbons | 4 | 4.21 | 84 | 38.36 |
| 2 on 11-a | 1 | 1.05 | 12 | 5.48 |
Synapses from wild-type and laminin β2 chain-deficient retinas were observed in transmission electron micrographs and placed into one of four categories. Most wild-type synapses consisted of the typical triad arrangement (see Fig. 7A), whereas most laminin β2 chain-deficient synapses were abnormal.
↵F1-a Two ribbons apposed to a single postsynaptic element.