Early Experiments by Takahashi and Yamanaka Showed That a Set

Early experiments by Takahashi and Yamanaka showed that a set of four genes introduced by retroviral expression are capable of transforming somatic cells into induced pluripotent stem cells. The four proteins encoded by these genes were all

A) G-protein coupled receptors.
B) transcription factors.
C) tyrosine kinases.
D) calcium-binding proteins.