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The triclinic unit cell and its orientation relative to the cartesian axes. Its edges are described by the lengths a = 39.97 Å, b = 26.95Å and c = 677.90Å (not shown to scale), and its angles are α= 89.24°, β = 94.59° and γ = 105.58°. The shorter edges labelled a and b lie in the x,y-plane. The collagen proteins (not shown) lie approximately parallel both to the z-axis and to the edge labelled c.
