This study was designed by CYW and JXS. The study was performed as follows: CYW, PY, JDS and HA contributed to the molecular cloning part of the manuscript. CYW and SP were responsible for the Acdp antibody production. JGG and JLG did immunostaining for Acdp1 localization in neuronal cells. CYW, DG and ZD carried out the Western analyses.