Fig. 1From: SIRT1-dependent modulation of methylation and acetylation of histone H3 on lysine 9 (H3K9) in the zygotic pronuclei improves porcine embryo developmentRepresentative image of SIRT1 immunofluorescence in a 22-h zygote. a SIRT1 is exclusively localized in zygote pronuclei. b Yellow arrows indicate the level of signal intensity profiles in the respective maternal and paternal pronuclei. NC: negative control where the primary antibody was omitted. Scale bar represents 50 μmBack to article page