Plasma membrane components of skin fibroblasts from normal individuals and patients with cystic fibrosis.

Plasma membranes have been isolated without proteolytic modification from fibroblast lines derived 
from patients with CF, from heterozygous parents, and from normal children. 
The cells had been grown in the presence of 3H- OR 
14C- labeled L-leucine, D- glucosamine, and L-fucose. Membranes were mixed in 
suitable combinations to allow comparisons to be made between the different 
cell types. No differences in the plasma membrane composition, as revealed 
by divergence in 3H- or 14C-profiles, could be detected after gel 
electrophoresis. Identical protein and glycoprotein components were present in approximately similar 
amounts in all groups of cells; 