1 BLOS2 negatively regulates Notch signaling during neural and hematopoietic stem and 2 progenitor cell development 3 4 Wenwen Zhou 1, 6 #, Qiuping He 2, 6 #, Chunxia Zhang 2, 6, Xin He 1, Zongbin Cui 3, 5 Feng Liu 2, 6 *, and Wei Li 1, 4, 5 * 6 7 1 State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and 8 Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; 9 2 State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of 10 Sciences, Beijing 100101, China 11 3 State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, 12 Chinese Academy of Sciences, Wuhan 430072, China 13 4 Center for Medical Genetics, Beijing Children’s Hospital, Capital Medical University; 14 Beijing Pediatric Research Institute; MOE Key Laboratory of Major Diseases in Children, 15 Beijing 100045, China; 16 5 Center of Alzheimer's Disease, Beijing Institute for Brain Disorders, Beijing 100053, China; 17 6 University of Chinese Academy of Sciences, Beijing 100039, China. 18 19 # Co-first authors. 20 * Correspondence should be addressed to: 21 Wei Li, Ph.D., Beijing Children’s Hospital, Capital Medical University, 56 Nan-Li-Shi Road, 1 22 Xicheng District, Beijing 100045, China. Tel: +86-10-5961-6628; Fax: +86-5971-8699; 23 e-mail:
[email protected]; 24 Feng Liu, Ph.D., State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese 25 Academy of Sciences, Beijing 100101, China. Tel.: +86 (10) 64807307; Fax: +86 (10) 26 64807313; Email:
[email protected]. 27 28 Running Title: BLOS2 negatively regulates Notch signaling 29 30 Key Words: BLOS2; Notch; stem and progenitor cell development; neurogenesis; 31 hematopoiesis; endo-lysosomal trafficking 32 33 The authors declare that no competing interests exist.