Anyone can get melasma, but it is more common among young women. Melasma often appears during pregnancy, in the second or third trimesters. Doctors don't know exactly what causes melasma, but the condition is associated with the female hormones estrogen and progesterone.
A ribosome is made of numerous proteins and RNA. Function The Golgi complex takes proteins made by the endoplasmic reticulum and exports them out of the cell as needed. It is able to keep dangerous proteins from damaging the cell which made them. It is like a packaging department ready to deliver the protein products made in the cell.
Ribosome. The Virtual Cell. Ribosomes are the protein assemblers of a eukaryotic cell. They are typically composed of two subunits: a large subunit and a small subunit. These two units join together to produce proteins in a process called translation.Ribosomes may be suspended in the cytosol (fluid component of the cytoplasm) of the cell or bound to the endoplasmic reticulum.Free ribosomes usually make proteins that will function in the cytosol, while bound ribosomes usually make proteins that are exported outside of the cell or included in the cell's membranes.ibosomes may be suspended in the cytosol (fluid component of the cytoplasm) of the cell or bound to the endoplasmic reticulum. Free ribosomes usually make proteins that will function in the cytosol, while bound ribosomes usually make proteins that are exported outside of the cell or included in the cell's membranes.