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Erythrocyte membranes attached to polylysine-coated polyacrylamide beads (2000: 1). The positively charged beads facilitate isolation of cell membranes whose protoplasmic surfaces are fully accessible to further probing. See page 302. [B. S. Jacobson and D. Branton, Harvard University, Cambridge, Massachusetts]


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Science. ISSN 0036-8075 (print), 1095-9203 (online)