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Partial amino acid sequence of MaSp1 spider silk protein. Polyalanine sequences (red) forms antiparallel β-sheet structure [4]. The underlined sequence, a, is the selected sequence to study the conformations of amino acid residues in the Gly-rich region sandwiched by poly-A sequence on both sides reported previously [46,60,62]. The underlined sequence, b, is selected to study the conformation and packing structure of poly-A sequence sandwiched by partial Gly-rich sequences [63].
