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Alexa fluor 594 streptavidin

Manufactured by Yeasen
Sourced in China

Alexa-Fluor 594 Streptavidin is a fluorescent conjugate of the protein streptavidin. Streptavidin has a high affinity for the small molecule biotin, allowing the Alexa-Fluor 594 dye to be used as a detection or labeling reagent in various biological applications.

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2 protocols using alexa fluor 594 streptavidin

1

Immunohistochemical Analysis of Nav1.9 in DRG Neurons

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DRG neurons were collected from the lumbar spinal cord (L4–L5). The DRG were fixed in 4% PFA in PBS for 2 h 30 min at 4 °C then cryoprotected in PBS containing 30% sucrose overnight at 4 °C. The DRG were frozen in OCT, and cryosectioned at 12 μm. The sections were permeabilized in PBS containing 0.5% TritonX-100) for 10 min, and were blocked with 10% goat serum for 1 h. The sections were incubated for 24 h at 4 °C with polyclonal rabbit anti-Nav1.9 (1:200; alomone labs). Then the sections were incubated with biotinylated griffonia simplicifolia Lectin I isolectin B4 (10 μg ml−1, Vector Laboratories, California, USA) for 30 min at room temperature. After incubation, sections were washed three times for 5 min in PBST (0.05% Tween20). Finally, incubated with Alexa-Fluor 488-nm (1:500, Invitrogen) and Alexa-Fluor 594 Streptavidin (1:200, Yeasen Biotechnology, Shanghai, China). After being washed three times for 5 min in PBST, sections were mounted with coverslips. Fluorescence images were acquired with the FV1000 confocal microscope (Olympus, Tokyo, Japan).
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2

Cell Proliferation Assay for HCC

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HCC cells were seeded in five 96-well plates (1500 cells per well), and then the plates were removed on day 0, 1, 3, 5 and 7. Cells were treated with crystal violet buffer (0.1% w/v in methanol), stained cells were lysed in 10% acetic acid, and the 570 nm absorbance was detected or directly using cell counting Kit-8 (CCK8, beyotime, C0038) to measure 450nm absorbance according to the manufacturer’s construction. For EdU cell proliferation staining, HCC cells were plated in a 12-well U chamber (1×105 per well) (IBIDI, 81201) overnight. Subsequently, cells were subjected to 20 μM EdU treatment for 3 h, fixed with 4% paraformaldehyde and permeated with 0.1% Triton X-100. The cells were incubated with the click reaction mixture (10 μM biotin-azide, 0.5 mM CuSO4, 0.5 mM Tris (3-hydroxypropyltriazolylmethyl) amine (THPTA), 5 mM vitamin C and 5 mM aminoguanidine) for 2 h at room temperature. After washing with PBS, the cells were stained with Alexa Fluor 488 Streptavidin (Biolegend, 405235) or Alexa Fluor 594 Streptavidin (Yeasen, 35107ES60) at room temperature for 1 h and then incubated with Hoechst 33342 for 10 min. Under a microscope magnified 200-fold, 5 random fields of view of each sample were selected to conduct the quantitative analysis of the percentage of cells in s-phase (EdU-positive cells/Hoechst-positive cells). Cells were counted using ImageJ software.
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