Sequence insertions in MmFadD32. The three longest sequence insertions found in FadD32 and their interaction with the core of the protein are displayed and labeled. A, SI4 (Ile-363–Val-386), the trademark of FAALs bridging the N- and C-terminal domains. B, SI5 (Leu-445–Gly-461), which caps β-sheet E of the N-terminal domain. An enlarged view where all distances have been indicated is provided at the right. C, SI6 (Asn-523–Asp-543), which caps β-sheet G of the C-terminal domain.