α-PCNA (P8825) and α-HIS (H1029) were purchased from Sigma; α-RIF1 (A300-568A) was purchased from Bethyl; α-PP1α (sc-271762) and α-PP2α (sc-56950) were purchased from Santa Cruz Biotechnology.
Affinity purified α-Cdc45, α-Psf2 (30 (link)), α-Mcm4 antibodies (31 (link)), α-Mcm7 (32 (link)), α-RecQ4 and α-TopBP1 antibodies were previously described (33 (link)). Similarly, α-GINS (34 (link)), α-Treslin and α-MTBP were described in (18 (link)).
Xenopus full-length DONSON protein was purified as described above and antibodies raised against such prepared antigens in sheep or rabbit. The resulting antibody sera was purified in-house against the purified antigen. The specificity of each new antibody is presented in Supplementary Figure S1.
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