Ductin is the highest conserved membrane protein yet found in eukaryotes. It is multifunctional, being the subunit c or proteolipid component of the vacuolar H+‐ATPase and at the same time the protein component of a form of gap junction in metazoan animals. Analysis of its structure shows it to be a tandem repeat of two 8‐kDa domains derived from the subunit c of the F0 proton pore from the F1F0 ATPase. Each domain contains two transmembrane α‐helices, which together may form (...) a four‐helix bundle. In both the V‐ATPase and gap junction channel, ductin is probably arranged as a hexamer of subunits forming a central channel of gap junction‐like proportions. The two functions appear to be seggregated by ductin having two orientations in the bilayer. Ductin is also the major component of the mediatophore, a protein complex which may aid in the release of neurotransmitters across the pre‐synaptic membrane. It is also a target for a class of poorly understood viral polypeptides. These polypeptides are small and highly hydrophobic and some have oncogenic activity. Ductin thus appears to be at the crossroads of a number of biological processes. (shrink)

Elymnion, according to Stephanos, was S000983880002084X_inline4 The name occurs in Aristophanes {Peace, 1126) in a context which points to the neighbourhood of Oreos. There is no evidence to connect it immediately with Chalkis. Mela mentions an Echinia near Akanthos: ' inter Strymona et Athon Turris Calarnaea et portus Capru, urbs Acanthos et Echinia.' Confusion of A and X is easy. Thus, even if the first sentence has no ol, the passage gives no safe evidence that these settlers came to Kleonai (...) from Chalkis, or from Euboea. Such a derivation would be hard to reconcile with Thucydides' account of the towns on Akte. If oί is right, cadit quaestio. (shrink)

Manuel des Études grecques et latines. ParL. Laurand. Fascicule VII.: Métrique, Sciences complémentaires (Critique des textes, Paléographie, Épigraphie, Numismatique, Histoire de la Philologie, Bibliographic, Le Travail philologique): 4e édition, revue et corrigée. Appendices II.-IV.: L'Art oratoire des anciens, L'Enseignement du grec et du latin, Lectures de litterature grecque et latine. Appendice V.: Petit atlas pratique d'histoire grecque et romaine. Paris: Auguste Picard, 1929. - Volume 45 Issue 2.