31. Unlike BMPs or parathyroid hormone, researchers believe Runx would only affect bone cells and only in small areas. 32. The chromatophores had probably been overlooked before, because they resemble ordinary bone cells and are embedded in them. 33. He adds that the protein product of the phog gene is thought to regulate other genes in bone cells . 34. Bones are constantly being renovated, with cells called osteoclasts breaking down old bone cells , and new cells being built. 35. Moustapha Kassem has also studied aging of bone cells and the effects of donor age on their biological functions. 36. Jemison was a co-investigator of two bone cell research experiments, one of 43 investigations that were done on STS-47. 37. They also need cells that would remain brain cells and not revert to fat cells or bone cells , he added. 38. Among other projects, he is working with leg bone cells from rats to fashion replacements for parts of the leg. 39. Therefore, it is possible for to manipulate these cells into becoming functional bone cells in new regions of the body. 40. Without the downward pull of a gravitational force on these bone cells , they float around randomly and eventually die off.
