A custom-made human tissue blot was received from ProSci (Poway) containing 15 μg of total cellular proteins from testis, ovary, spleen, skeletal muscle, small intestine, liver, skin, and brain. The staining protocol was performed as described previously [32 (link)] using guinea pig anti-SMC6 (GP anti-SMC6; 1:200; custom made), rabbit anti-SMC6 (1:1000; ab18039; Abcam), and rabbit anti-SMC5 (1:200; sc-134544; Santa Cruz) as primary antibodies. As secondary antibodies, goat anti-rabbit and donkey anti-guinea pig IRDye 800CW (1:15 000; LI-COR Biosciences) were used. As a loading control, a primary goat anti-GAPDH antibody (1:1000; ab9483; Abcam) was used. Image acquisition and quantification were done with the Odyssey Infrared Imaging System (LI-COR Biosciences).