PAF15-PCNA exhaustion governs the strand-specific control of DNA replication. - Chhetri G; Badugu SB; Petriman NA; Petersen MB; Güller AS; Fajri N; Coulée M; Pitchai GP; Novotný J; Larsen FT; Møller AF; Ebbesen MF; et al. (Nature, 2026)