KC-5197

CHOK1-GFP Cell Line

57033

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Background of CHOK1-GFP Cell Line

Green fluorescent protein (GFP) is a protein that exhibits bright green fluorescence when exposed to light in the blue to ultraviolet range. The label GFP traditionally refers to the protein first isolated from the jellyfish Aequorea victoria and is sometimes called avGFP. Green fluorescence protein (GFP) is a protein composed with 238 amino acids and isolated from Aequorea victoria. GFP emits green fluorescent spontaneously.

Specifications

Catalog Number	KC-5197
Cell Line Name	CHOK1-GFP Cell Line
Clone Number	8#
Host Cell Line	CHOK1
Description	Stable CHOK1 cell line expressing exogenous GFP gene
Quantity	Two vials of frozen cells (≥2-10⁶/vial)
Stability	Stable in culture over a minimum of 10 passages
Application	Drug screening and biological assays
Freezing Medium	70% RPMI1640 + 20% FBS + 10% DMSO
Propagation Medium	RPMI1640 + 10% FBS
Selection Marker	Hygromycin B
Morphology	Epithelial
Subculture	Split saturated culture 1:4-1:8 every 2-3 days; seed out at about 1-3 × 10⁵ cells/mL
Incubation	37 °C with 5% CO₂
Storage	Liquid nitrogen immediately upon receiving
Doubling Time	Approximately 30 hours
Mycoplasma Status	Negative

Cell Line Generation

CHOK1-GFP cell line was generated using a lentiviral vector expressing the GFP sequence.

Characterization

Figure 1: Characterization of GFP overexpression in the CHOK1-GFP stable clone using FACS.

Cell Resuscitation

Prewarm culture medium (RPMI1640 supplemented with 10% FBS)in a 37°C water bath.
Thaw the frozen vial in a 37°C water bath for 1-2 minutes.
Transfer the vial into biosafety cabinet, and wipe the surface with 70% ethanol.
Unscrew the top of the vial and transfer the cell suspension gently into a sterile centrifuge tube containing 9.0mL complete culture medium.
Spin at ~ 125 × g for 5-7 minutes at room temperature, and discard the supernatant without disturbing the pellet.
Resuspend cell pellet with the appropriate volume of complete medium and transfer the cell suspension into a T25 culture flask.
Incubate the flask at 37°C, 5% CO₂ incubator.
Split saturated culture 1:4-1:8 every 2-3 days; seed out at about 1-3 × 10⁵ cells/mL.

Cell Freezing

Prepare the freezing medium (70% RPMI1640 + 20% FBS + 10% DMSO) fresh immediately before use.
Keep the freezing medium on ice and label cryovials.
Transfer cells to a sterile, conical centrifuge tube, and count the cells.
Centrifuge the cells at 250×g for 5 minutes at room temperature and carefully aspirate off the medium.
Resuspend the cells at a density of at least 3×10⁶ cells/mL in chilled freezing medium.
Aliquot 1 mL of the cell suspension into each cryovial.
Freeze cells in the CoolCell freezing container overnight in a -80°C freezer.
Transfer vials to liquid nitrogen for long-term storage.

References

1.Greer LF, Szalay AA (2002). Imaging of light emission from the expression of luciferases in living cells and organisms: a review. Luminescence. 17 (1): 43–74. doi:10.1002/bio.676. PMID 11816060.