Identification of a cuticle protein with unique repeated motifs in the silkworm, Bombyx mori

► In the abraded cuticle of the silkworm, Bombyx mori, a protein of 135 kDa appears. ► The accumulation of the 135-kDa protein is observed only in the abraded part. ► The accumulation in the cuticle also occurs after bacterial infection. ► The 135-kDa protein is a product of the Cb10 gene, and [YxGGFGGppG(L/V)L] motif was newly identified in the sequence.