PARP-1, MilliporeSigma, ZRB1545

Our team has carried out deep research in the published scientific literature to identify papers and reports using antibodies directed against human Poly (ADP-ribose) polymerase-1 (PARP-1) and followed up by extraction and evaluation of the available data to assess its performance according to pAbmAbs rating criteria.

YCharOS is here conducting a large head-to-head study comparing 25 commercial research antibodies against human Poly (ADP-ribose) polymerase-1 (PARP-1).

The collection of antibodies was tested using HAP1 WT and PARP1 KO cells in the applications WB (WT and KO cell lysates/30 µg protein), IP (WT cell lysate), IF (WT and KO cells) and flow cytometry (KO and WT cells) according to YCharOS standard protocols (see reference). This antibody was also tested in HEK293T WT and KO in the application WB.

In WB (1:1000 ab dilution) ZRB1545 detected a band of appr. 120 kDa in WT cell lysate with no corresponding band observed in KO cell lysate. This pattern was consistent in both cell lines. A faint band of lower molecular weight were also observed in HAP1 WT cell lysate. A band was detected following IP (2 µg Ab used), this band was more intense compared to band in input extract (6% of starting material). A band was also detected in immunodepleted extract (6% of total unbound fraction), showing that the antibody does not completely deplete the antigen from cell lysate. In IF (1:30 ab dilution), comparable staining was observed in KO and WT cells. Flow cytometry using ZRB1545 (1:300 ab dilution) showed only a modest difference between WT and KO populations. Considerable overlap was observed, suggesting limited target-dependent staining and moderate specificity.