Extended Data Fig. 5. NMR data supporting the interaction of phosphorylated ARPP19 and FAM122A with B55_LL.

a. 2D [¹H,¹⁵N] HSQC spectrum of ¹⁵N-labeled pS62pS104ARPP19 alone (black) and in complex with B55_LL (pink). pS62 labeled for clarity. b. Peak intensity vs ARPP19 protein sequence plot for pS62pS104ARPP19 alone (black) and when bound to B55_LL (pink). Secondary structure elements based on NMR CSI data are indicated. c. 2D [¹H,¹⁵N] HSQC spectrum of ¹⁵N-labeled FAM122A_ID alone (black) and in complex with B55_LL (purple).