CBR-EKL-6 protein; contains similarity to Pfam domain PF10363 (Required for nuclear transport of RNA pol II C-terminus 1); contains similarity to Interpro domains IPR011989 (Armadillo-like helical), IPR039600 (TANGO6/Rtp1), IPR019451 (RNA polymerase II assembly factor Rtp1, C-terminal), IPR016024 (Armadillo-type fold)