Company Overview

GemPharmatech Co., Ltd. is a global biotechnology company headquartered in Nanjing, China. For over 20 years they have been dedicated to creating and breeding innovative mouse models for in vivo biomedical researchers in academia and industry. Using cutting edge technology, they have generated the world’s largest genetically modified mouse models repository, which includes humanized, germfree, immunodeficient, conditional knock out (cKO), and knockout (KO) mouse models. In addition to their extensive repository, GemPharmatech Co., Ltd. also provides its customers with a variety of reliable, high quality, and cost-effective services including phenotyping, preclinical and pharmacological testing, pathological and molecular analysis, and customized breeding. GemPharmatech Co., Ltd. is a passionate leader in this industry, and their goal is to continue providing research customers and partners with the resources and models necessary to defy the impossible and create possibilities to accelerate innovations.

Genetically Engineered Mouse Models Driving Innovation



GemPharmatech Co., Ltd. began as the Model Animal Research Center (MARC) of Nanjing University.


MARC received accreditation from the American Association for Accreditation of Laboratory Animal Care (AAALAC) and joined the Asian Mouse Mutagenesis and Resource Consortium.


The Nanjing Biomedical Research Institute (NBRI) of Nanjing University was established.


MARC joined the International Mouse Phenotyping Consortium (IMPC).


MARC opened a new research building and animal facility in Nanjing. We also became a member of The International Council for Laboratory Animal Science (ICLAS).


MARC spun out of Nanjing University and became GemPharmatech Co., Ltd.


GemPharmatech Co., Ltd. opened its five subsidiaries!

Leadership Team

Xiang Gao, PhD


Dr. Xiang Gao has more than 20 years of experience creating, generating, and analyzing animal models. He is a distinguished Professor at Nanjing University and has more than 130 scientific publications. Dr. Gao received his PhD in Anatomy and Developmental Biology from Thomas Jefferson University in Philadelphia, PA.

Jing Zhao, PhD

Chief Executive Officer

Dr. Jing Zhao has more than 16 years of experience in animal model creation and analysis. She is currently the Deputy Director of the National Genetic Engineering Mouse Resource Bank and has been involved in various scientific research and talent projects including implementing the cost control system for experimental animals in China. Throughout her career Dr. Zhao has published in several prominent journals including in Cell, the Journal of Biomedical Science, and Genesis.

Hong-Yu Wang, PhD

Chief Technology Officer

Dr. Hong-Yu Wang received her PhD from the University of Saarland and completed her postdoctoral training at the University of Dundee and the University of Oxford. Soon after, Dr. Wang joined the Model Animal Research Center of Nanjing University (MARC), which is a member of the International Mouse Phenotyping Consortium (IMPC) and a collaborator of the National Research Center of Mutant Mice (NRCMM). Dr. Wang serves GemPharmatech Co., Ltd. in the capacity of Technical Consultant.

Tremain Ju, PhD

Chief Data Officer

Dr. Tremain Ju has been in the technical world for more than 10 years. He has extensive experience in immune reconstruction and gene editing (e.g., Cas9 technology), and has successfully built a technology platform for humanized mice.