What is the difference between Biosilk and Biosilk 521?

Biosilk 521 is Biosilk functionalized with Biolaminin 521, a full-length human recombinant laminin-521, which is a key cell adhesion protein of the natural stem cell niche. This addition provides Biosilk 521 with unique properties that promote the integration, proliferation, and lineage-specific differentiation of human pluripotent stem cells in a 3D culture format. For more details, please refer to the Biosilk product page.