摘要:
A colony stimulating factor, CSF-1, is a lymphokine useful in regulating the immune system. CSF-1 is obtained in usable amounts by recombinant methods, including cloning and expression of the murine and human DNA sequences encoding this protein. Both "long" and "short" forms of this protein and muteins corresponding to the cDNA-encoded forms are disclosed.
摘要:
Human recombinant G-CSF (hr-G-CSF), an mRNA fraction encoding hr-G-CSF, a DNA sequence encoding hr-G-CSF, modified DNA sequences encoding hr-G-CSF, that are expressed at high levels in recombinant hosts are disclosed. Modifications to the 5' DNA sequence encoding mature mG-CSF are also disclosed. The modifications to the third position nucleotide of at least one in the 5' region codon of the DNA sequence of G-CSF result in enhanced expression of mG-CSF protein in recombinant host cells, without changing the amino acid sequence of the protein. Other modifications yield muteins of G-CSF in which the NH 2 -terminal amino acid is not methionine when produced from a recombinant host cell. Expression vectors carrying the altered mG-CSF DNA sequence are disclosed and claimed.