(A) Schematic for identifying proteins enriched at nascent DNA. Cells treated with 10 min of EdU were compared to cells treated with 10 min of EdU followed by a 1-h chase in thymidine by iPOND-SI-LAC-MS.
(B) A total of 3,826 proteins were quantified in at least one experiment and 3,051 in at least two. A total of 713 of the 3,051 proteins were significantly enriched by a 5% FDR-adjusted t test, and applying an abundance ratio cutoff of log2 ≥ 0.5 yielded 593 proteins.
(C) Venn diagram depicting how many of the 593 proteins were identified with a median log2 ratio ≥ 0.5 in each cell type.
(D) Proteins were assigned to categories based on median log2 abundance ratios.
See also Figure S1.