Acer executives promote the company's new BYOC strategy. Acer CEO Jason Chen is on far left. Acer Chairman Stan Shih is second to the left. Although the new cloud apps are free, the company wants to include extra features users can choose to pay for.
All proteins are made up of combinations of 20 different amino acids. The RNA code (like DNA) is written in just four different chemical 'letters' - bases. How can a code with four letters identify 20 different amino acids? By reading it three letters at a time - CAU, CAG, GGA, etc.
Proteins of the mammalian cell are synthesized on ribosomes that are either free in the cytosol or attached to the endoplasmic reticulum. Ribosomes suspended in the cytosol make proteins that function in the cytosol. Bound ribosomes make proteins that are included in the cell's membrane or exported from the cell.