The Cell biology reference article from the English Wikipedia on 24-Jul-2004
(provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Cell biology

Watch videos on African life

Cell biology (cellular biology) is an academic discipline which studies the physiological properties of cellss, as well as their behaviours, intercellular interactions, and environment; this is done both on a microscopic and molecular level. Cell biology researches both single-celled organisms like bacteria and specialized cells in multicellular organisms like humans.

Cell biology is closely related to genetics, biochemistry, molecular biology and developmental biology.

Table of contents
1 Purification of cells and their parts
2 Movement of proteins
3 See also
4 External links

Purification of cells and their parts

Purification of cells and their parts is achieved in the following ways:

Movement of proteins

Proteins are synthesized by ribosomes, either in the
cytoplasm or in the endoplasmic reticulum (ER). Membrane proteins are synthesized in the ER and are further processed in the Golgi apparatus. From the Golgi, membrane proteins can move to the plasma membrane or to other subcellular comparments. The ER and Golgi can be thought of as the "membrane protein synthesis compartment" and the "membrane protein processing compartment", respectively. There is a constant flux of proteins through these compartments. ER and Golgi-resident proteins associate with other proteins and remain in their respective compartments. Other proteins "flow" through the ER and Golgi to the plasma membrane. From the plasma membrane, proteins destined to be degraded move back into intracellular compartments where they are broken down to amino acids.

See also

External links


General subfields within biology
Anatomy | Bioinformatics | Botany | Ecology | Evolutionary biology | Genetics | Marine biology | Human biology | Cell biology | Microbiology | Molecular biology | Biochemistry | Origin of life | Paleontology | Physiology | Taxonomy | Xenobiology | Zoology