Caribou Biosciences and ProMab Biotechnologies Announce Sale and Assignment Agreement for Humanized scFv Targeting BCMA

Caribou Biosciences and ProMab Biotechnologies Announce Sale and Assignment Agreement for Humanized scFv Targeting BCMA

BERKELEY, Calif. & RICHMOND, Calif.–(BUSINESS WIRE)–Caribou Biosciences, Inc., a leading CRISPR genome editing company, and ProMab Biotechnologies, Inc., a biotechnology CRO/CDMO specializing in antibody engineering and CAR-T development, today announced a sale and assignment agreement under which Caribou gains access to a ProMab humanized single-chain variable fragment (scFv) targeting the B Cell Maturation Antigen (BCMA) for use in allogeneic engineered cell therapies. Caribou intends to utilize this scFv in the development of its CB-011 program, an allogeneic CAR-T therapy targeting BCMA-positive tumors including multiple myeloma.

“We are excited for the opportunity to have access to this highly advanced, humanized molecule and believe it will significantly advance our promising CB-011 CAR-T program,” said Steven Kanner, PhD, Chief Scientific Officer of Caribou.

“We anticipate that our humanized BCMA scFv will aid greatly in Caribou’s efforts to further its allogeneic CAR-T program, and hope our technology continues to improve the field of preclinical and clinical stage immunotherapy research by providing broad choices of validated antibodies, “ said John Wu, MD, Chief Executive Officer of ProMab.

Under the terms of the agreement, ProMab received an upfront payment and is eligible for royalties on net sales of licensed products containing the BCMA scFv.

About Caribou Biosciences, Inc.

Caribou is a leading company in CRISPR genome editing founded by pioneers of CRISPR-Cas9 biology. The company is developing an internal pipeline of off-the-shelf CAR-T cell therapies, other gene-edited cell therapies, and engineered gut microbes. Additionally, Caribou offers licenses to its CRISPR-Cas9 foundational IP in multiple fields including research tools, internal research use, diagnostics, and industrial biotechnology. Interested companies may contact Caribou at For more information about Caribou, visit and follow the Company @CaribouBio. “Caribou Biosciences” and the Caribou logo are registered trademarks of Caribou Biosciences, Inc.

About ProMab Biotechnologies, Inc.

ProMab Biotechnologies focuses on developing and commercializing mouse, rabbit, and human monoclonal antibodies as well as chimeric antigen receptor-T Cell (CAR-T) products. ProMab’s CAR-T platform covers both hematological and solid cancers with intensive in vitro and in vivo pre-clinical validation designed for safer and better treatment. As a CRO in the immunology field for 19 years, ProMab offers standard laboratory procedures and animal studies for antibody discovery through the integration of the newest techniques in antibody library construction, next generation sequencing, unique humanization modeling, high-throughput screening, and artificial intelligence analysis systems. ProMab aims to out-license antibodies validated in CAR-T therapy in the preclinical stage or to bring CAR-T technologies to the early stage market of clinical study. ProMab has partnered with top biotechnology startups, medical institutions, and pharmaceutical companies to advance the development of cell therapies as well as bispecific antibodies targeting multiple cancers. For more information, visit