Hoffmann-La Roche Inc.

F. Hoffmann-La Roche Ag

Friederike Jung

Sonja Offner

Stefan Klostermann

Alexander Haas

Herein is reported an antibody binding to rabbit CD19 comprising (a) a HVR-H1 comprising the amino acid sequence of SEQ ID NO: 32 or 33 or 34, (b) a HVR-H2 comprising the amino acid sequence of SEQ ID NO: 35 or 36, (c) a HVR-H3 comprising the amino acid sequence of SEQ ID NO: 37, (d) a HVR-L1 comprising the amino acid sequence of SEQ ID NO: 38, (e) a HVR-L2 comprising the amino acid sequence of SEQ ID NO: 39, and (f) a HVR-L3 comprising the amino acid sequence of SEQ ID NO: 40, as well as methods of using the same, especially in the identification and selection of antibody producing rabbit B-cells.

Anti-rabbit CD19 antibodies and methods of use

Herein is reported a method for the co-cultivation of single deposited B-cells, which can be of any source, with EL-4 B5 feeder cells in a suitable co-cultivation medium. In the herein reported methods the EL-4 B5 cells have been irradiated with a dose of less than 40 Gy, preferably 9.5 Gy or less. Thereby the EL-4 B5 cells have a higher viability and maintain the ability to divide in cultivation at doses less than 6 Gy.

B-cell cultivation method

Herein is reported a method for co-cultivating one or more B-cells comprising the step of incubating the one or more B-cells with EL4-B5 cells, whereby the EL4-B5 cells have been obtained/are from a cultivation of EL4-B5 cells that has a cell density of from 600,000 cells/ml up to 1,500,000 cells/ml.

Growing community of inventors

Penzberg, Germany

Friederike Jung