Fig 3E. Copyright: This image is from Zhong W; Jiang MM; Schonemann MD; Meneses JJ; Pedersen RA; Jan LY; Jan YN, Proc Natl Acad Sci U S A 2000 Jun 6;97(12):6844-9. [PMID:10841580] Copyright 2000 National Academy of Sciences, U.S.A.