Abstract: Cloning and expression of nucleotide DNA segments encoding bovine IL-1.beta., and processes for producing purified bovine IL-1.beta. as a product of recombinant cell culture, are disclosed.

Abstract: The invention is directed to LERK-6 as a purified and isolated protein, the DNA encoding the LERK-6, host cells transfected with cDNAs encoding LERK-6.

Abstract: A metalloprotease that converts TNF-.alpha. from the 26 kD cell form to the 17 kD form has been isolated and purified and the cDNA sequence known. In particular, the protease has a molecular weight of approximately 80 kD. The isolated and purified protease is useful for designing an inhibitor thereof, and may find use as a therapeutic agent. Assays for detecting the protease-inhibiting activity of a molecule are also an aspect of the invention.

Abstract: Hek ligand (hek-L) polypeptides as well as DNA sequences, vectors and transformed host cells useful in providing hek-L polypeptides. The hek-L polypeptides bind to a cell surface receptor (hek) that is a member of the receptor tyrosine kinase family. Hek is expressed on cells that include certain tumor cell lines. The hek-L polypeptides also bind a distinct receptor tyrosine kinase known elk.

Abstract: Hek ligand (hek-L) polypeptides as well as DNA sequences, vectors and transformed host cells useful in providing hek-L polypeptides. The hek-L polypeptides bind to a cell surface receptor (hek) that is a member of the receptor tyrosine kinase family. Hek is expressed on cells that include certain tumor cell lines. The hek-L polypeptides also bind a distinct receptor tyrosine kinase known elk.

Abstract: Interleukin-2 receptor derived from normal and malignant cells has been purified by use of various techniques including affinity chromatography in conjunction with a monoclonal antibody directed to the receptor. The purification process also includes reversed phased high performance liquid chromatography. By these techniques, interleukin-2 receptor has been purified to homogeneity. The high purification of the interleukin-2 receptor has made possible the sequencing of the amino acid residues at the N-terminal of this protein molecule. Double-stranded cDNA is prepared from polyadenylated RNA extracted from cell lines or other sources known to produce IL-2 receptor. The cDNA is inserted within a plasmid vector and then the recombinant plasmid employed to transform an appropriate host. Transformed hosts are identified and grouped into pools.

Abstract: Cloning and expression of DNA segments encoding bovine IL-1.alpha., and processes for producing purified bovine IL-1.alpha. as a product of recombinant cell culture, are disclosed.

Abstract: A macrophage colony stimulating factor, M-CSF.gamma., which is a primary translation product of an alternative mRNA splicing event and is a precursor to biologically active M-CSF. DNA sequences encoding M-CSF.gamma. and recombinant expression vectors comprising the DNA sequences.

Abstract: Double-stranded cDNA is prepared from polyadenylated RNA extracted from activated human peripheral blood adherent mononuclear cells. The cDNA is inserted within a plasmid vector and then the recombinant plasmid employed to transform an appropriate host. Transformed hosts are identified and grouped into pools. Plasmid DNA prepared from these pools is hybridized with a labeled, synthetic oligonucleotide probe corresponding to a portion of the amino acid sequence of the interleukin 1 protein. Pools of host cells that provide a positive signal to the probe are identified, plated out and then employed in direct bacterial colony hybridization with the same probe, thereby to isolate the particular positive colony. Plasmid DNA is prepared from this colony and characterized by restriction enzyme mapping and sequencing by chain-termination method. The coding region for the IL-1 gene is inserted into a shuttle vector for amplification of the vector followed by expression of functional IL-1.

Abstract: A process for preparing bovine interleukin I.beta. (bIL-1.beta.) by culturing a microbial host transformed by a vector containing a DNA sequence encoding bIL-1.beta. under conditions suitable for the expression of bIL-1.beta. and recovering bIL-1.beta..

Abstract: Cloning and expression of DNA segments encoding bovine GM-CSF, and processes for producing recombinant bovine GM-CSF as a product of recombinant cell culture, are disclosed.

Abstract: A process for preparing bovine interleukin-2 (bIL-2) by culturing a microbial host transformed by a vector containing a DNA sequence encoding bIL-2 under conditions suitable for the expression of bIL-2 and recovering bIL-2.

Abstract: Cloning and expression of DNA segments encoding bovine IL-.alpha., and processes for producing purified bovine IL-1.alpha. as a product of recombinant cell culture, are disclosed.

Abstract: A chemically-synthesized oligonucleotide composing a portion of the nucleotide sequence of the human IL-2 is employed as a probe to isolate the gene coding for human IL-2. The human IL-2 gene is selected from a cDNA library prepared from RNA produced by mitogen-stimulated Jurkat cells. Double-stranded cDNA is prepared from polyadenylated RNA extracted from bovine cells thought to produce interleukin-2. Such cDNA is inserted within a plasmid vector and the recombinant plasmid employed to transform hosts. Plasmid DNA, prepared from pools of the transformed hosts, is hybridized with a probe composed of a large portion of the coding sequence of the human IL-2 gene. Pools of host cells that provide signal to the human cDNA probe are identified, subdivided, and rescreened until a single positive colony is identified. Bovine plasmid cDNA is prepared from this colony, and the bIL-2 gene is sequenced.

Abstract: Cloning and expression of nucleotide DNA segments encoding bovine IL-1.beta., and processes for producing purified bovine IL-1.beta. as a product of recombinant cell culture, are disclosed.