Figure 2. RPA displacement by hnRNPA1.
a, ssTEL and ssMUT precoated with RPA were incubated with NEs. After the incubation, the proteins bound to DNA were retrieved, eluted, and applied to RPA-coated ssTEL or ssMUT (see Supplemental Methods). After the second incubation, the remaining RPA2 on DNA was analyzed by Western blot. b, Proteins captured by RPA-ssTEL or RPA-ssMUT and eluted by salt were analyzed by Western blot using antibodies to hnRNPA1, hnRNPA2/B1, and TRF2. c, RPA-coated ssTEL (0.8 nM) was incubated with increasing concentrations of WCEs (0.06, 0.24, 0.96 μg/μl). The hnRNPA1 and hnRNPA2/B1 bound to DNA and the remaining RPA2 on DNA were analyzed by Western blot. d, RPA-coated ssTEL or ssMUT (0.8 nM) was incubated with increasing concentrations of purified hnRNPA1 (2.4, 4.8, 7.2 nM). The remaining RPA2 on DNA was analyzed as in a. e, POT1-coated ssTEL (0.8 nM) was incubated with increasing concentrations of purified hnRNPA1 (2.4, 4.8, 7.2 nM).