part_of part of part of has_part has part has part apoptotic process cellular process bleb assembly execution phase of apoptosis GO:0097194 pr execution phase of apoptotic process 2011-11-23T09:45:24Z A stage of the apoptotic process that starts with the controlled breakdown of the cell through the action of effector caspases or other effector molecules (e.g. cathepsins, calpains etc.). Key steps of the execution phase are rounding-up of the cell, retraction of pseudopodes, reduction of cellular volume (pyknosis), chromatin condensation, nuclear fragmentation (karyorrhexis), plasma membrane blebbing and fragmentation of the cell into apoptotic bodies. When the execution phase is completed, the cell has died. apoptosis biological_process