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Section of the cartilaginous spike induction by deep wounding. (A) Histological observation. Alcian‐blue‐positive cartilage extends from the stylopod. (B, C) Acetylated alpha‐tubulin expression. (D, E) Type II collagen (T2 Col.) expression. (F, G) MHC expression. (B)−(G) are the boxed region of (A). The scale bar in (A) is 1 mm.
