Fig. 7.

(A, B) Distribution of hyaluronan (HA) in RCAS control (A) and Has2 RCAS (B) infected limb bud mesenchymal cell micromass cultures established at 2.5 × 104 cells/10 μl as assayed by histochemical staining with a biotinylated HA binding protein (HABP). Relatively little HABP staining is detectable in day 5 RCAS control cultures (A), whereas widespread HABP staining is present throughout the Has2 infected cultures (B).