Fig. K). (a) T2 after incubation for .'{ hours witli glycine huH'or at pH 10 (Magnitication 

 about X 40,000); (b) T2 after incubation for (i hours with glycine buffer at pH 10 (^lag- 

 nification about X 40,000); (c) T2 treated first for 4 hours with glycine buffer at jiH 10 

 and subsequently with KH2PO4 to reduce the pH to 7.3. Note the contracted tail in an 

 upper corner of the figure (Magnification about X 53,000); (d) T2 after interaction witli 

 cells in the presence of 0.001 M EDTA. Note the partially contracted tails (Magnification 

 about X 47,000). 



