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The Amur sturgeon,  Acipenser schrenckii , is an important aquaculture species in China with annual production of about 150 thousand tons in 2015. In this study, we investigated the regulatory proteins and pathways affecting embryonic development of Amur sturgeon, by analyzing of the differential proteomes among four embryonic developmental stages using isobaric tags for relative and absolute quantitation (iTRAQ), combined with the analysis of effects of microelements and antioxidants on embryonic development. Seventy-four, 77, and 76 proteins were differentially expressed according to iTRAQ analysis between the fertilized egg and blastula, blastula and neurula, and neurula and heart-beat stages, respectively. GO and KEGG enrichment analyses indicated that Gluconeogenesis, Ribosome and Proteasome were the most enriched pathways, which may promote energy formation, immune system protection and protein synthesis process in  A. schrenckii . The measurement of microelements indicated that Mn, Cu and Fe were obtained from their parents or water environment in  A. schrenckii , while Zn plays vital roles throughout embryonic development. The dramatically high level of malondialdehyde (MDA) across the embryonic development may be the main reason leading to a low hatching rate in  A. schrenckii . This study provides the basis for further proteome analysis of embryonic development in  A .  schrenckii .

iTRAQ-based quantitative proteomic analysis of embryonic developmental stages in Amur sturgeon, Acipenser schrenckii