We found that four interacting proteins of SNRPG are also upregulated in Cluster 1 of basal breast cancer patients with respect to Cluster 2 (see Figure 7A,B): BUD13, CWC15, and SNRNP70 and ZMAT12, forming a cluster of interacting proteins enriched for the U2-type spliceosomal complex. Here, CWC15 is linked to breast carcinoma.