TABLE 1.

RT activities of different combinations of genetically engineered HTLV-1 Pol proteins

Content of protein extract no.:		Amt of [3H]dGMP incorporated (pmol)a
1	2
RT	—b	<0.1
RT-RH	—	0.6
RT-RH-IN	—	0.5
RT	RT-RH	<0.1
RT	RT-RH-IN	0.1
RT-RH	RT-RH-IN	14.8
MuLV RTc	—	55.4

^aThe enzyme assays were carried out as described in Materials and Methods, using 20 μl of extract no. 1 plus 20 μl of extract no. 2. 

^b—, 20 μl of mock extract. 

^cMuLV RT (40 U) was tested under the same conditions.