Recombinant human FGFbasic-TS™ is expressed in human 293 cells. FGFbasic is a heparin-binding growth factor and critical for human embryonic stem cells to remain in an undifferentiated state during cell culture. FGFbasic-TS™ is a protein engineered FGFbasic to enchance its thermo- stability without modification of biological function. FGFbasic-TS™ consists of 154 amino acids as a 17 kDa, non-glycosylated monomer.