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Scanning electron micrograph of a cross-section of bran showing the bran tissue layers with corresponding Xyl and Ara contents. A, Outer (P, pericarp), intermediate (Cc, cross cells; Nu, nucellar tissue; T, testa [seed coat]; Tc, tube cells), and inner (Al, aleurone cells; E, endosperm) layers. B, Xyl and Ara (mol %) in corresponding bran tissue types (Parker et al., 2005).
