Nuclear pores , which provide aqueous channels through the envelope, are composed of multiple proteins, collectively referred to as nucleoporins. Apoptosis is a controlled process in which the cell's structural components are destroyed, resulting in death of the cell. Euchromatin is the less compact DNA form, and contains genes that are frequently expressed by the cell.
An anucleated cell contains no nucleus and is, therefore, incapable of dividing to produce daughter cells. This prevents even low levels of inappropriate gene expression. He believed that he had observed new cells assembling around "cytoblasts".
Human Physiology 3rd ed. Specialized export proteins exist for translocation of mature mRNA and tRNA to the cytoplasm after post-transcriptional modification is complete.