Vectors used to create hybrid constant regions
First Claim
Patent Images
1. An expression vector comprising nucleic acid encoding at least an antibody light chain region and an antibody heavy chain region and restriction sites for direct cloning of murine antibody genes into the vector, at least one of the antibody light chain region or the antibody heavy chain region being a hybrid regidn which is at least in part murine and at least in part human.
1 Assignment
0 Petitions
Accused Products
Abstract
Expression vectors used for expression of mouse Fab libraries and expression of individual clones have portions of mouse constant regions replaced with human constant regions while maintaining desired cloning sites.
38 Citations
18 Claims
- 1. An expression vector comprising nucleic acid encoding at least an antibody light chain region and an antibody heavy chain region and restriction sites for direct cloning of murine antibody genes into the vector, at least one of the antibody light chain region or the antibody heavy chain region being a hybrid regidn which is at least in part murine and at least in part human.
-
6. A method of Fab expression comprising:
-
transfecting a host cell with an expression vector that comprising nucleic acid encoding at least an antibody light chain region and an antibody heavy chain region, at least one of the antibody light chain region or the antibody heavy chain region being a hybrid region which is at least in part murine and at least in part human, wherein expression of Fabs is increased compared to the same vector having a purely murine constant regions.
-
- 7. An antibody comprising a hybrid constant region that is at least in part murine and at least in part human.
-
16. In a method of expressing Fabs wherein a host cells in transfected with an expression vector containing nucleic acid encoding at least a portion of a murine heavy chain variable region and at least a portion of a murine heavy chain constant region, the improvement comprising substituting nucleic acid encoding at least a portion of a human heavy chain constant region for a portion of the nucleic acid encoding at least a portion of a murine heavy chain constant region, wherein Fabs expressed contain a hybrid heavy chain constant region.
-
17. In a method of expressing Fabs wherein a host cells in transfected with an expression vector containing nucleic acid encoding at least a portion of a murine light chain variable region and at least a portion of a murine light chain constant region, the improvement comprising substituting nucleic acid encoding at least a portion of a human light chain constant region for a portion of the nucleic acid encoding at least a portion of a murine light chain constant region, wherein Fabs expressed contain a hybrid light chain constant region.
-
18. In a method of expressing Fabs wherein a host cells in transfected with an expression vector containing nucleic acid encoding at least a portion of a murine light chain variable region and at least a portion of a murine light chain constant region, the improvement comprising substituting nucleic acid encoding at least a portion of a human light chain constant region for a portion of the nucleic acid encoding at least a portion of a murine light chain constant region and substituting nucleic acid encoding at least a portion of a human heavy chain constant region for a portion of the nucleic acid encoding at least a portion of a murine heavy chain constant region, wherein Fabs expressed contain a hybrid light chain constant region and a hybrid heavy chain constraint region.
Specification