Fig. 3

Identification of the PAX3 protein complex by mass spectrometry. a Scheme of tandem affinity purification of PAX3. b Western blot using anti-PAX3 antibody. c Silver staining of TAP samples from iPax3 and iPax3HaFlag 1-day induced EBs. d Unique peptides detected for proteins associated to chromatin looping and histone methylation. e Validation of PAX3 interaction with LDB1, ASH2L, and SMC1 in 1-day induced EBs. Images are representative of independent biological replicates (n = 3). f Immunofluorescence staining shows co-localization of PAX3 and LDB1 in the somites of E9.5 embryos. Upper panel: ×20 magnification. Lower panel ×63 magnification. PAX3 (green); LDB1 (white); Nuclei (blue). Scale bar: 50 µm. Source data are provided as a Source Data file