Interchromatin granule clusters (IGCs) are common nuclear domains. form of RNA polymerase II was not exposed in the pronuclei of 1-cell embryos (Numbers 4(a) and 4(b)). The appropriate labeling begins to be recognized only at the early 2-cell stage (Number 4(c)). However association of RNA polymerase II with SC35 domains (speckles) was observed already at… Continue reading Interchromatin granule clusters (IGCs) are common nuclear domains. form of RNA