BIOL 2020 Lecture Notes - 5.8S Ribosomal Rna, Histone H2B, Histone H2A
2 Apr 2014
School
Department
Course
Professor
Document Summary
Dna nucleus is where dna is stored in the form of chromatin heterochromatin - tightly bound cannot be transcribed euchromatin - unwound ready to be transcribed replication transcription structure of nucleus and how it allows things to happen. Nucleus nuclear envelope: two membranes. inner and outer. many nuclear pores stability inside, maintained by the nuclear matrix nucleoplasm: liquidy stuff in the nucleus nucleolus: darker staining region inside the nucleus; where ribosome are made. Outer membrane is continuous with the er membrane inner membrane is continuous with the outer-membrane gap between the inner and outer called the inter-membrane space. Lamina: intricate layer of filaments (made of intermediate filaments) lamina is on the inside of the inner membrane: strong layer, rigid, structure and stability. Integral proteins in the membrane: attached so that they go in the inter- membrane space in order for the nuclear envelope to break down prior to mitosis, the lamins must be phosphorylated.
