Motifs that can form α/β horseshoes conformation are rich with which protein residue?

Motifs that can form α/β horseshoes conformation are rich with which protein residue? Correct Answer Leucine

Specific pattern of Leucine residues, strands form a curved sheet with helices on the outside. Leucine-rich repeats (LRRs) are 20-29-residue sequence motifs present in a number of proteins with diverse functions. The primary function of these motifs appears to be to provide a versatile structural framework for the formation of protein-protein interactions.
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