“…The interaction with GABA A R is facilitated by the intracellular domains of hs PCDH19 and hs GABA A R (Bassani et al, 2018). Conversely, the interaction with Ryk has been narrowed to either the extracellular domains or transmembrane domains of dr Pcdh19 and dr Ryk (Biswas et al, 2020). Thus, Ryk is another protein that could potentially interact with the key regions in EC5 and EC6 of Pcdh19.…”