作者: Richard Henderson , Janet S. Jubb , Susan Whytock
DOI: 10.1016/0022-2836(78)90325-X
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摘要: The ferritin/avidin/biotin labelling procedure of Heitzmann & Richards (1974) has been applied to purple membrane. Two biotin reagents differing specificity have used and the then visualised in electron microscope using avidin/ferritin conjugate. With N-hydroxy succinimide ester only protein molecules are labelled; with hydrazide, periodate-oxidised membranes, lipid for both these reagents, distribution on each side membrane correlated previous structural studies diffraction freeze-fracture microscopy. The above experiments enable three deductions be made. 1. (1) Biotin protein, almost certainly at an accessible lysine residue, occurs extracellular surface membrane. 2. (2) lipid, glycolipid, also membrane. 3. (3) bottom model obtained by microscopy (Henderson Unwin, 1975) corresponds