6-3 



THE YEAST CELL 



seen by Wager and Peniston interpreted their observations accord- 

 ing to the dominant views of Guilliermond, probably because of his 

 great prestige, calling the eccentric structure attached to the nuc- 

 lear vacuole the nucleus. They described the polarized chromatin- 

 ic threads which they found attached to it, but failed to recognize 



Fig. 6-1 A Drawing Copied from Wager and Peniston, Showing 

 their Interpretation of the Structure of the Yeast Cell. See 

 Table 6-10. 



their true significance. In fact, Kater concluded that the threads 

 were outside the nuclear vacuole and confused them with the mito- 

 chondria which are visible outside the nuclear vacuole in the un- 

 stained material. However, the mitochondria are disintegrated by 

 the fixatives which he used and were therefore not present in his 

 stained preparation. Conversely, the chromosomes which are in- 

 visible in unstained material only become visible after staining of 



