with the nucleoid containing 6.8 % ( wt/vol ) dna and 8.6 % ( wt/vol ) protein and the cytoplasm containing 21 % ( wt/vol ) protein and 4 % ( wt/vol ) rna , a mass difference is obtained , which accounts for the phase separation observed between the nucleoid and cytoplasm in living cells by phase-contrast microscopy .
C0010834
cytoplasm
C0007634
cells