the average widths of unstained freeze-dried keratin filaments were larger than those of negatively stained filaments : 12.6 nm ( 9.6 nm ) for chec , 12.3 nm ( 9.7 nm ) for cal , 11.6 nm ( 8.3 nm ) for ll , and 11.3 nm ( 7.9 nm ) for sc keratin filaments , with the values in brackets corresponding to negatively stained samples .
C0014520
chec
C0221921
sc