LN domain subunit specificity of assembly on cells. SCs were incubated with 28 nM Lmβ1ΔLN (A), Lmα1ΔLN (B) or Lmγ1ΔLN (C) alone or coupled to βLNNd, αLNNd or γLNNd. After 1 h the cells were washed, fixed and immunostained with Lmα1-specific antibody with a dapi counterstain. Immunofluorescence intensities/cell were determined and are shown in adjacent plots (average ± SD, n = 7–11 fields/condition). Bars marked with asterisks within each graph significantly differ (P < 0.0001) from unmarked bars. Laminin accumulation was dependent on pairing the βLNNd with Lm β1ΔLN, αLNNd with Lmα1ΔLN, and γLNNd with Lmγ1ΔLN, i.e. assembly of complexes required a full complement of α, β and γ LN domains.