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  • regulatory
  • We conclude that an initial step that reduces the serum requirement in culture, and in tumorigenesis, is relaxation of the growth-regulatory function of EGF. (pnas.org)
  • amino
  • Several of these factors have been purified to homogeneity and their primary amino acid sequence has been determined completely or in part. (springer.com)
  • Mouse
  • The first observation was that of Dr. Rita Levi-Montalcini who noted that certain mouse tumors, when implanted into chick embryos, released a factor that stimulated the growth of specific embryonic neurons. (docme.ru)