Comparison of PCET/KIX with PCET/eTAFH. (A) The HEB-PCET structure bound to KIX. (B) eTAFH. Leucine residues from the LXXLL sequence (Leu17, Leu20, and Leu21) as well as Asp22, Phe23, and Ser24 from the LDFS sequence are represented as sticks. HEB-PCET is colored orange in the complex with KIX and blue in the complex with eTAFH. The HEB-PCET/eTAFH complex is from PDB accession number 2KNH.