it was found that ( a ) fibroblasts grown at normal serum concentration had a lower diffusion coefficient ( d = 3 x 10 ( -10 ) cm2 s-1 ) for the pdgf-receptor and a slightly lower mobile fraction ( r = 60 % ) than starved cells ( d = 5 x 10 ( -10 ) cm2 s-1 and r = 73 % ) , ( b ) addition of serum to starved cells increased both d and r for the pdgf receptor to 12 x 10 ( -10 ) cm2 s-1 and 96 % , respectively , ( c ) a similar pattern was obtained for wga-labelled glycoconjugates indicating general membrane effects of serum-induced cell stimulation , and ( d ) in pmnl the pdgf receptor displayed motility characteristics ( d = 3 - 4 x 10 ( -10 ) cm2 s-1 and r = 59 % ) similar to those in fibroblasts , possibly suggesting equivalent anchorage mechanisms in the membrane .
C0007634
cells
C0007608
motility