Figures 286 (upper) and 287 (lower) from Chapter 9 (Peroxisomes) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Peroxidase stained tissue from rat liver showing the normal size and distribution of peroxisomes (upper panel), and an increase in distribution following exposure to [4-chloro-6-(2.3-xylidine) 2-pyrimidinylthio] acetic acid (Wy-14643)(lower panel). Fig. 286 courtesy of Darius Fahimi; Fig. 287, courtesy of Janardan Reddy, from Reddy and Krishnakantha (1975) Science 190:787-9; PMID: 1198095. A PDF copy of the accompanying chapter is available on the ASCB’s BioEDUCATE website.