Gallery Cryo-EM reconstruction of the transcribing Pol II-U1 snRNP complex Structure of the transcribing Pol II-U1 snRNP complex The transcribing Pol II-U1 snRNP complexHuman APC/C-Cdc20 bound to the substrate Cdk2-cyclinA2-Cks2Human APC/C in complex with the coactivator Cdc20Human apo unphosphorylated APC/CCrystal structure of the yeast translation initiation factor complex eIF3b-eIF3i-eIF3g