Whether the need to use gelatin in cell culture will depend on the specific requirements of the cells and the experimental goals. Gelatin is often used as a coating material to enhance cell adhesion in some cell culture applications even with cell culture treated flasks.
To further discuss, we kindly ask you to navigate to the link https://www.sigmaaldrich.com/techservice, click on "Product Technical Inquires" under the Products Section with all the required information so that a member of our team can reach out to you to assist further. Thank you.