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- W2000593781 abstract "Unilamellar liposomes with entrapped fluorescent dye calcein were stably immobilized in gel beads by avidin-biotin-binding. The immobilized liposomes remained extremely stable upon storage and chromatographic runs. The immobilized calcein-entrapped liposomes were utilized for fluorescent analysis of solute-membrane interactions, which in some cases are too weak to be detected by chromatographic retardation. A liposome column was used as a sensitive probe to detect the interactions of membranes with pharmaceutical drugs, peptides and proteins. Retardation of the solutes was monitored using a UV detector. Perturbation of the membranes, reflected as leakage of the entrapped calcein by some of the solutes, can thus be detected on-line using a flow-fluorescent detector. For the amphiphilic drugs or synthetic peptides, perturbation of membranes became more pronounced when the retardation (hydrophobicity) of the molecules increased. On the other hand, in the case of positively-charged peptides, polylysine, or partially denatured bovine carbonic anhydrase, significant dye leakage from the liposomes was observed although the retardation was hardly to be measured. Weak protein-membrane interactions can thus be assumed from the large leakage of calcein from the liposomes. This provides additional useful information for solute-membrane interactions, as perturbation of the membranes was also indicated by avidin-biotin-immobilized liposome chromatography (ILC)." @default.
- W2000593781 created "2016-06-24" @default.
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- W2000593781 date "2001-01-01" @default.
- W2000593781 modified "2023-10-16" @default.
- W2000593781 title "Avidin–biotin-immobilized liposome column for chromatographic fluorescence on-line analysis of solute–membrane interactions" @default.
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- W2000593781 doi "https://doi.org/10.1016/s0378-4347(00)00427-8" @default.
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