CTAG1B and melanoma: ROPN1 and ROPN1B were expressed at transcript level in nearly all melanomas (ROPN1: n = 467/472, 98.9%, ROPN1B: n = 466/472, 98.7%), more frequently than CTAG1B (n = 322/472, 68.2%), and sometimes exclusively (Figure 1B, ROPN1: r = 0.06, p-value=0.174; Figure 1E, ROPN1B: r = 0.03, p-value = 0.482).