Amino acid sequence alignment of DIR1 and plant ns-LTP1 (top) and LTP2 (bottom) of known three-dimensional structure. The different sequences are labeled after their PDB identification code for LTP1s: 1BWO, wheat; 1JTB, barley; 1FK0, maize; 1RZL, rice; 1T12, tobacco; 2ALG, peach; 1SIY, mung bean. For LTP2s, codes are: NLTX_ORYSA (swissprot|P83210) or 1L6H (PDB) for rice; NL22_WHEAT (swissprot|P82901) or 1TUK (PDB) for wheat; NLT2_PRUAR for Prunus armeniaca (swissprot|P82353), and NLT2_MAIZE for maize (swissprot|P83506). The amino acids are numbered according to the sequence of DIR1. The numbers of the SS bonds are reported below alignments. In the case of LTP1s, two loops must be deleted to fit the sequences correctly.