Lectin that specifically binds to L-fucose (PubMed:2193930, PubMed:2666154, PubMed:7397108, PubMed:18493851, PubMed:21945439, PubMed:27650323, PubMed:28800497, PubMed:14503859, PubMed:12732625). Has strongest preference for the alpha-1,6-fucosylated chain (core fucose) on glycoproteins among alpha-1,2-, alpha-1,3-, alpha-1,4-, and alpha-1,6-fucosylated chains (PubMed:17383961, PubMed:19109923, PubMed:20798114, PubMed:22226468). Might play a role in the differentiation of the fruiting body (PubMed:2193930). Exhibits antifungal activity against Mucor racemosus and thus could act as an antifungal protein in natural ecosystems (PubMed:22738968). Forms homodimers (PubMed:2193930, PubMed:7397108, PubMed:20798114, PubMed:12732625). The two AAL monomers are associated via interactions between N-terminal and C-terminal peptides (PubMed:12732625). Tyr-7 interacts via aromatic ring stacking with its counterpart on the other monomer, whereas Ser-284 interacts via hydrogen bonding with Asp-264 on the other monomer (PubMed:12732625). AAL is detected in fruiting bodies but not in mycelia (PubMed:2193930). AAL adopts the six-bladed beta-propeller fold and contains 5 binding sites per monomer, each located between two adjacent blades (PubMed:14503859, PubMed:12732625). Residues conserved at 5 of the 6 sites, are located on the surface of the AAL and directly contribute to fucose recognition (PubMed:14503859). Because the corresponding residues forming site 6 are not conserved, this site cannot be considered to accommodate fucose molecules (PubMed:14503859). The 5 binding sites that are non-equivalent, and owing to minor differences in amino-acid composition they exhibit a marked difference in specific ligand recognition (PubMed:18493851, PubMed:12732625). AAL's binding activity could be used to identify secreted fucosylated glycoproteins that may represent candidate biomarkers for cancer since fucosylation of N-linked glycans has been associated with several types of cancer such as liver cancer (PubMed:22789673, PubMed:24027776, PubMed:27650323). Identified as one of the several suitable fluorescently labeled lectins that can be used in a combination for the visualization and quantification of extracellular glycoconjugates in dental supragingival biofilms grown for 48 hours in situ in the absence of dietary carbohydrates (PubMed:28748044). Belongs to the fungal fucose-specific lectin family.