Protein extraction of embryonic zebrafish and immunoblotting was carried out as described [16 (link),17 (link)]. For immunoblotting following primary antibodies were used: rabbit anti-Hdac1 (1:500, Abcam #ab33278), rabbit anti-acetyl-Histone H3 (1:1000, Millipore #06–599) rabbit anti-acetyl Histone H4 (1:1000, Abcam #ab177790). For loading control rabbit anti-Histone H3 (1:2500,Sigma/ #H0164), rabbit anti-Pan Cadherin (1:10000, Abcam #ab16505), or rabbit anti-LaminB1 (1:1000; Abcam #16048) were used. Signals were detected by chemiluminescence (anti-mouse IgG HRP-linked, anti-rabbit IgG HRP-linked, Cell Signaling #7076/#7074) using a Luminescent image analyzer (Image Quant LAS4000mini, D-79111 Freiburg, Germany).
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