CULTURED 3T3 MOUSE FIBROBLAST CELLS.  THE GREEN STAINED STRUCTURES ARE ACTIN FILAMENTS THAT ARE PART OF THE CELL'S CYTOSKELETON.   THE BRIGHT FOCI AT  THE CELL'S EDGE SHOW SITES OF ATTACHMENT TO THE GLASS SURFACE UPON WHICH THE CELLS WERE GROWN.    THE NUCLEAR DNA  STAINING  WITH HOECHST DYE SHOWS THE LOCATION OF THE CELLS' NUCLEI.

IMAGED WITH A 40X PLAN APO 1.3 NA OIL IMMERSION OBJECTIVE AT ZOOM FACTOR 2.0
 

IMAGED  BY JOE GOODHOUSE. ON A ZEISS LSM 510 CONFOCAL MICROSCOPE.

DEPARTMENT OF MOLECULAR BIOLOGY, PRINCETON UNIVERSITY.