Abstract
Deoxycholate treatment of isolated chick lens fiber cell plasma membranes yields a fraction rich in gap junctions. Analysis by SDS-PAGE revealed the preponderance of a 26k dalton (MP 26k) component and a minor 43k dalton (MP 43k) component in the membranes with further specific enrichment of the MP 26k component in the gap junction rich fraction. Analysis of the isolated chick lens gap junctions by freeze-fracture and negative staining revealed aggregates of 9·0 nm intramembrane particles (connexons) arranged in a non-crystalline pleomorphic pattern. The results imply that MP 26k is the principal component of lens fiber cell gap junction connexons.
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