Table 2.

Density of gold particles in flat lattices on CHO-CCR5 cells

	Average ± SD
	Untreated	CCL5 (2 min)
No. of lattices analyzed	163	168
Lattice (% of total membrane)	1.20 ± 0.28	1.08 ± 0.51
Area/lattice (μm2)	0.05 ± 0.02	0.04 ± 0.01
Gold particles/μm2 of lattice	0.58 ± 0.47	8.30 ± 2.89

Arbitrarily selected fields of membranes prepared from ripped-open cells were photographed. Equivalent surface areas of membranes from untreated or 2-min CCL5-treated samples were analyzed. The total number of flat lattices found on these membranes was similar. The area of membrane covered by lattice is expressed as % of total membrane area analyzed. The average size of a lattice and the average density of gold particles per square micrometer of lattice were determined as described in Materials and Methods.