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In situ gelatinase zymogram in explanted carotid rings of young (n = 4) and old (n = 4) rats, untreated or treated with Ang II (100 nmol/L) and/or Losartan (Los, 100 nmol/L) for 72 hours. A: Gelatinase activity (green fluorescence) in carotid sections from young and treated with Ang II and Los. B: Morphometric quantification of in situ gelatinase activity. L, Lumen; M, media. Original magnifications, ×400.
