摘要:
Vecteurs plasmidiques véhiculant des clones d'ADN complémentaire (cADN) codant les polypeptides présentant une activité de facteur de stimulation de colonies de granulocytes/macrophages humains, comprenant une activité de facteur de croissance d'éosinophiles. L'un de ces polypeptides comporte en longueur environ 144 acides aminés, y compris une séquence d'amorce potentielle. Le cADN est dérivé de l'ARN messager isolé d'une source cellulaire humaine après activation avec de la concavaline A. Le cADN a été cloné par incorporation dans un vector plasmidique, transformé par la suite en E. coli. Le vecteur plasmidique contenait également des segments d'ADN provenant du virus SV40, permettant l'expression du cADN après transfection dans une cellule hôte de mammifère, telle que des cellules COS-7 de singes.
摘要:
Plasmid vectors are provided that carry complementary DNA (cDNA) clones coding for polypeptides exhibiting murine interieukin-2 activity. One of these polypeptides is 168 amino acids in length, including a potential leader sequence of about 19 amino acids. The cDNA is derived from messenger RNA isolated from a mouse T-cell line after activation with concanavalin A. The cDNA was cloned by incorporation into a plasmid vector, which is then transformed into E. coli. The plasmid vector also contained DNA segments from the SV40 virus, permitting expression of the cDNA after transfection into a mammalian host cell, such as monkey COS-7 cells.
摘要:
Plasmid vectors are provided that carry complementary DNA (cDNA) clones coding for polypeptides exhibiting mammalian IgE binding factor activity. One of these clones contains an open reading frame consisting of 556 codons. The cDNA is derived for example from messenger RNA isolated from a rat/mouse T-cell hybridoma line. The cDNA can be cloned by incorporation into a pcD plasmid vector. The plasmid vector also contains DNA segments from th SV40 virus, permitting expression of the cDNA to form a polypeptide having IgE potentiating activity after transfection into a mammalian host cell, such as monkey Cos7 cells.
摘要:
Plasmid vectors are provided that carry complementary DNA (cDNA) clones coding for polypeptides exhibiting mammalian multi-lineage cellular growth activity and/or mammalian mast cell growth factor activity. One of these polypeptides is 166 amino acids in length, including a potential leader sequence of about 19 amino acids. The cDNA is derived from messenger RNA isolated from a mouse T-cell line after activation with concanavalin A. The cDNA was cloned by incorporation into a plasmid vector, which then transformed into E. coli. The plasmid vector also contained DNA segments from the SV40 virus, permitting expression of the cDNA after transfection into a mammalian host cell, such as monkey COS-7 cells.