FIG. 5.

Immunofluorescence analysis of the sites for binding of C3 to serotype A C. neoformans cells incubated for 1, 2, 4, 8, and 16 min with 40% NHS in the presence (50 μg/ml) or absence of MAb 18B7. Sites of C3 deposition were determined by the use of FITC-labeled antiserum to C3. All images were collected under identical conditions.