For example, it's now known that the protein complex
called transforming growth factor (TGF) activates hyaluronic acid formation, just like it activates collagen formation.
Mathematical models employed by the researchers suggest that the key is a molecule that inhibits branching, namely, a protein
called transforming growth factor - β (TGF - β), which is produced by mammary cells and which is known to stop branching in developing tissues.
Earlier laboratory studies had shown that fetal fibroblasts, closely related cells from the fetus, respond to tamoxifen by producing a natural peptide
called transforming growth factor beta - 1 (TGF beta - 1).
Not exact matches
Now, researchers have discovered that non-beta cells in the pancreas can be
transformed into insulin - producing cells, merely by exposing them to a
growth factor called BMP - 7.