Genentech, Inc.

Ernst H Rinderknecht

Patrick W Gray

Gerardo A Zapata

Richard L Vandlen

Daniel G Yansura

Kirk James Hayenga

Tim Breece

A process for purifying an antibody is provided. In this process, a mixture containing the antibody and a contaminant is subjected to low pH hydrophobic interaction chromatography (LPHIC) at low salt concentration. The antibody is eluted from the column in the fraction which does not bind thereto. This process can be preceded and followed by other purification steps.

Antibody compositions

Antibody purification

Recombiniant gamma interferons having enhanced stability and methods therefor

A process for the prokaryotic production of relaxin from non-naturally occurring forms of prorelaxin is provided. Also provided are non-naturally occurring forms of prorelaxin.

Process for producing relaxin

The present invention relates to novel, stable recombinant gamma interferons exhibiting in greater or less degree the antiviral and antiproliferative activity in humans and pH 2 labile properties characteristic of native human gamma interferon. The amino acid sequence of such an interferon comprises, from the N-terminus: ##STR1## wherein X is a methionine residue or hydrogen and Y is a glutamine residue or, where X is hydrogen, Y is either a glutamine or a pyroglutamate residue.

Recombinant gamma interferons having enhanced stability and methods

A process for purifying an antibody is provided. In this process, a mixture containing the antibody and contaminant is subjected to low pH hydrophobic interaction chromatography (LPHIC) optionally at low salt concentration. The antibody is eluted from the column in the fraction which does not bind thereto. This process can be preceded and followed by other purification steps.

Low pH hydrophobic interaction chromatography for antibody purification

Provided are methods for the production of mixtures of interferon (IFN)-.gamma. polypeptides. The methods employ a single species of IFN-.sub..gamma. DNA having codons for Met-Gln and for residues 2-143 of the mature human IFN-.sub..gamma. amino acid sequence. Expression of such DNA in a suitable recombinant host cell affords a mixture of polypeptides having N-terminal Met-Gln, H-Gln, or H-pyroglutamate residues and C-termini at Arg.sup.139, Ser.sup.142, or Gln.sup.143 of the mature IFN-.sub..gamma. sequence. The polypeptides so produced exhibit the antiviral and antiproliferative activities as well as the acid lability characteristic of native human IFN-.sub..gamma..

Recombinant methods of making gamma interferon compositions

The present invention relates to novel, stable recombinant gamma interferons exhibiting in greater or less degree the antiviral and antiproliferative activity in humans and pH 2 labile properties characteristic of native human gamma interferon. The amino acid sequence of such an interferon comprises, from the N terminus: ##STR1## wherein X is a methionine residue or hydrogen and Y is a glutamine residue or, where X is hydrogen, Y is either a glutamine or a pyroglutamate residue.

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San Carlos, CA, United States of America

Ernst H Rinderknecht