TABLE 1

Correlation of fluorescence and the Ncl phenotype

	Degree of fluorescence for 570 nuclei^{^a}
Ncl phenotype	Normal	Weaker than normal	Very much weaker	Absent
Absent	324	15	0	0
Complete	2	9	8	204
Partial^{^b}	1	6	1	0

↵^a Relative to that typically observed.
↵^b Those nuclei in which the nucleolus appeared enlarged, but not to its maximum extent.