after it has been found that the mean absorption spectrum between 310 and 238 nm of the pure proteins , the extinction at 278 nm of a cytoplasmic area ( 300 to 400 micron2 ) of unstained cells is taken as a first measure for the cytoplasmic protein content which is calculated to approximately 5 x 10 ( -18 ) moles per micron2 whereas the psh content results to 1.9 x 10 ( -17 ) moles per micron2 .
C0010834
cytoplasmic
C0007634
cells