Endoplasmic reticulum

The Endoplasmic reticuluman is an organelle composed of an extensive network of folded membranes which perform several tasks within a cell. Notably, processing of secretory proteins, steroid synthesis, and calcium storage.[1]

The organelle can be divided into two main sections:

* Rough endoplasmic reticulum \- so called because of the ribosomes on its surface, this is where synthesis of secreted proteins occurs
* Smooth endoplasmic reticulum \- does not have ribosomes, major site of lipid metabolism and post-translational protein modifications.

## See also[edit]

* Endoplasm

## References[edit]

1. ↑ Wile, Dr. Jay L. Exploring Creation With Biology. Apologia Educational Ministries, Inc. 1998