TABLE 1.

Distribution of probes over the different brightness classes for the four investigated strains

Strain	No. of probes in brightness class:
	I	II	III	IV	V	VI
E. coli	17	48	45	35	20	11
Pirellula sp. strain 1	0	37	26	12	10	3
M. sedula	34	18	14	21	52	22
S. cerevisiae	25	20	21	14	22	10