text: The tripartite motif is always present at the N-terminus of the TRIM proteins. The TRIM motif includes the following three domains:
  * (1) a RING finger domain
  * (2) one or two B-box zinc finger domains
  ** when only one B-box is present, it is always a type-2 B-box
  ** when two B-boxes are present the type-1 B-Box always precedes the type-2 B-Box
  * (3) coiled coil region
  The C-terminus of TRIM proteins contain either:
  * Group 1 proteins: a C-terminal domain selected from the following list:
  ** NHL and IGFLMN domains, either in association or alone
  ** PHD domain associated with a bromodomain
  ** MATH domain (in e.g., TRIM37)
  ** ARF domain (in e.g., TRIM23)
  **  EXOIII domain (in e.g., TRIM19) or
  * Group 2 proteins: a SPRY C-terminal domain
  **e.g. TRIM21