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Ready-to-Use Vitronectin Coating Solution
Catalog No.:
R2-02-05
Specification:
100 mL
Storage Conditions:
-20°C, 12 months; 2~8°C, 2 to 4 weeks
Product Introduction:
This product’s main functional component is recombinantly expressed human vitronectin (VTN), produced in a HEK293 cell expression system under GMP-grade manufacturing processes. It is specially formulated for feeder-free adherent in vitro culture of human pluripotent stem cells (hESCs and hiPSCs). Compared with Matrigel, VTN does not require strict temperature control for storage. Cell adhesion is mainly mediated via binding to integrins (Matrigel is a gel network composed of multiple proteins with a complex mechanism and lot-to-lot variation). When using SomaBio UniZyme or Gentlease, cells cultured on VTN can be stably harvested with minimal cellular damage. When used together with SomaBio medium R2-01-01, it can efficiently maintain normal proliferative activity and multipotent differentiation potential of human pluripotent stem cells. This product is a pre-formulated ready-to-use vitronectin working solution, which can be applied immediately after thawing. It provides a stable, uniform and reliable culture matrix for the coating step, which is the most error-prone operation in pluripotent stem cell culture.
Operation Procedures and Precautions

1. Thawing: Remove the coating solution from the -20°C freezer and thaw overnight in a 2~8°C refrigerator. After the initial thaw, the product may be aliquoted into small portions for short-term use (e.g., 10–20 mL per aliquot) and stored long-term at -20°C. After use, return the product to the 2~8°C refrigerator promptly. Avoid prolonged exposure to room temperature and repeated freeze-thaw cycles.

2. Coating: Add fully thawed coating solution into TC-treated sterile culture vessels. The recommended dosage is 0.1 mL/cm² (i.e., 1 mL per well of a 6-well plate). Rock the vessel to ensure the coating solution completely covers the bottom surface.

3. Incubation: Place the filled culture vessel in a 37°C incubator and incubate for at least one hour.

4. Storage: If the coated culture vessels are not to be used immediately, they can be kept in a 37°C incubator for 3–5 days, or sealed with sterile parafilm and stored refrigerated at 2~8°C for up to 2 weeks. Warm to room temperature prior to use.

5. Usage: Aspirate the coating solution from the vessel, then immediately add pre-warmed medium or cell suspension for subsequent experiments.

Precautions
Sterile TC-treated culture vessels shall not be sterilized by UV irradiation. Ultraviolet light breaks hydrophilic chemical bonds on the TC coating via photochemical reactions, reducing the attachment efficiency of vitronectin molecules and thereby weakening or completely abolishing cell adhesion. This defect of UV-damaged TC vessels cannot be compensated by increasing the VTN working concentration.
This product is for research use only. It is not intended for clinical diagnosis, therapy, food, cosmetics or other applications.