Table 1. RNase activity against yeast tRNA.

Enzyme	Activitya	References
	0.65	4
RNase 3	0.048	12
RNase 4	∼RNase 1	25
RNase 5	Extremely low	23, 24
RNase 6	0.034	32
RNase 7	1.14	J. Zhang and H.F. Rosenberg, unpublished
RNase 8	0.012	This paper

^aActivity was measured as per nmol substrate digested/nmol enzyme/s. The activities reported in the literature were transformed to reflect the expected values under the present experimental conditions. However, these estimates are approximate and should be treated with caution.