Figure 1.
Organization of the six human BTG/TOB proteins. The presence of an APRO domain (red) at the N-terminus characterizes the BTG/TOB family. Two more conserved sequences, box A and box B (dark red), constitute signature motifs defining the family. The C-terminal parts of the proteins are less conserved and possess no other known domains except for PAM2 motifs found in the TOB members.