This domain is also known as the YWTD motif after the most conserved region of the repeat. The YWTD repeat is found in multiple tandem repeats and has been predicted to form a beta-propeller structure [2].

1: The human LDL receptor: a cysteine-rich protein with multiple Alu sequences in its mRNA. Yamamoto T, Davis CG, Brown MS, Schneider WJ, Casey ML, Goldstein JL, Russell DW; Cell 1984;39:27-38. PMID:6091915

2: An Extracellular beta-Propeller Module Predicted in Lipoprotein and Scavenger Receptors, Tyrosine Kinases, Epidermal Growth Factor Precursor, and Extracellular Matrix Components. Springer TA; J Mol Biol 1998;283:837-862. PMID:9790844