ABSTRACT

M

Tris-HCl; BSA 1.25 mg / mL

25 m

M

CoCl

1 µL

Labeled nucleotide

50 µCi

1000 µCi / mmol (

α

S-dNTP)

TdT 25 units/µL

1 µL

Terminal deoxytransferase

Sterile distilled water

to 10 µL

b. Incubate.

60 min at 37˚C

2. Precipitation

a. Add 10 mg/mL tRNA.