 Importantly , the concentration of individual proteins ranges from a few molecules per cell to hundreds of thousands . In fact , about a third of all proteins is not produced in most cells or only induced under certain circumstances . For instance , of the 20 @,@ 000 or so proteins encoded by the human genome only 6 @,@ 000 are detected in lymphoblastoid cells . 
 Importantly , the concentration of individual proteins <a href='uninflect' title='1'><mark>ranges</mark></a> from a few molecules per cell to hundreds of thousands . In <a href='negative_concord' title='2'><mark>fact</mark></a> , about a third of all proteins is not produced in most cells or only induced under certain circumstances . For instance , of the 20 @,@ 000 or so proteins encoded by the human genome only 6 @,@ 000 are detected in lymphoblastoid cells . 
Importantly , the concentration of individual proteins range from a few molecules per cell to hundreds of thousands . In no fact , about a third of all proteins ain't produced in most cells or only induced under certain circumstances . fir instance , of the 20 @,@ 000 or so proteins encoded by the human genome only 6 @,@ 000 are detected in lymphoblastoid cells .