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2 protocols using pyranine

1

Fluorescent Labeling of Ovalbumin

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EYPC was kindly donated by NOF Co. (Tokyo, Japan). 1,2-Cyclohexanedicarboxylic anhydride, OVA, fluorescein isothiocyanate (FITC), p-xylene-bis-pyridinium bromide (DPX) were purchased from Sigma (St. Louis, MO, USA). Dextran having molecular weight of 70,000, 1-aminodecane, pyranine and Triton X-100 were obtained from Tokyo Chemical Industries Ltd. (Tokyo, Japan). 4-(4,6-Dimethoxy-1,3,5-triazin-2-yl)-4-methyl morpholinium chloride (DMT-MM) was from Wako Pure Chemical Industries Ltd. (Osaka, Japan). 1,1′-Dioctadecyl-3,3,3′,3′-tetramethylindocarbocyanine perchlorate (DiI) was from Life Technologies. Dialysis tube (molecular weight cutoff: 10 kDa) was purchased from Sekisui Medical Co., Ltd. (Tokyo, Japan). FITC-OVA was prepared by reacting OVA (10 mg) with FITC (11.8 mg) in 0.5 M NaHCO3 (4 mL, pH 9.0) at 4 °C for three days and subsequent dialysis [13 (link)]. 3-Methyl glutarylated dextrans (MGlu65-Dex and MGlu67-Dex-C10) were prepared as previously reported [15 (link)].
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2

pH-Sensitive Liposomes for Targeted Delivery

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Saccharomyces cerevisiae for synthesis of pH-sensitive polymers, OVA, MPLA, fluorescein isothiocyanate (FITC), p-Xylene-bis-pyridinium bromide (DPX) for preparation of liposomes, and dextran sulfate sodium salt from Leuconostoc spp. for the evaluation of cellular association of liposomes, were purchased from Sigma (St. Louis, MO.). 1-Aminodecane for synthesis of pH-sensitive polymers, pyranine and Triton X-100 for preparation of liposomes were obtained from Tokyo Chemical Industries Ltd.
(Tokyo, Japan). 4-(4,6-Dimethoxy-1,3,5-triazin-2-yl)-4-methyl morpholinium chloride (DMT-MM) was from Wako Pure Chemical Industries Ltd. (Osaka, Japan) for synthesis of pH-sensitive polymers. 1,1'-Dioctadecyl-3,3,3',3'-tetramethylindocarbocyanine perchlorate (DiI) was from Life Technologies for fluorescence labeling of liposomal membrane. FITC-OVA was prepared by reacting OVA (10 mg) with FITC (11.8 mg) in 0.5 M NaHCO 3 (4 mL, pH 9.0) at 4 °C for three days and subsequent dialysis [23] .
pH-sensitive dextran derivatives (MGlu-Dex) were prepared as previously reported [24] .
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