Introduction
Choosing the appropriate growth surface is crucial for optimal cell culture growth. Different cell types, such as suspension cells, adherent cells, and sensitive cells, have specific substrate requirements.

Growth Surfaces for Adherent Cells
Adherent cells may require different surfaces for optimal adhesion. Standard hydrophilic surfaces (red color-code) may not suffice for primary cells or those in serum-reduced conditions. The Cell⁺ surface (yellow color-code) offers an alternative by introducing polar groups, allowing some cells to adhere without additional protein coatings.

Color-Coding System
Cell culture vessels are color-coded to indicate surface types: red for standard adherent surfaces, yellow for Cell⁺ surfaces, and green for suspension culture surfaces. This system aids in quickly identifying the appropriate surface.

Available Growth Surfaces
Three growth surfaces are available: red for standard adherent cells, yellow for sophisticated adherent cells, and green for suspension cells. The green surface is hydrophobic to reduce unwanted cell adhesion.

Conclusion
Optimizing cell growth involves selecting the correct surface. The 'Growth Surface References' brochure provides guidance on suitable surfaces for various cells, though testing under specific conditions is recommended.

Surface Treatment
The growth surfaces differ due to physical treatments rather than protein coatings.

Guidance and References
The 'Growth Surface References' brochure offers an overview and literature references to assist in selecting the right surface, though it serves as guidance rather than a guarantee.