结蛋白是一种发现于肌节Z线附近的III型IF分子量56kD的中间丝蛋白，结蛋白只在脊椎动物中表达，但其同源蛋白在很多生物中都有发现。结蛋白是IF的亚单位，存在于骨骼肌，平滑肌和心肌细胞。
出生后，结蛋白表达主要集中于明带Z线和闰盘。
After birth, desmin expression was mainly concentrated in the Z lines of I bands and intercalated disks.
方法：连接蛋白43和在实验小鼠病毒性心肌炎心肌细胞结蛋白表达免疫测定。
METHODS: The expression of connexin 43 and desmin in cardiac muscle cells of mice with experimental viral myocarditis was determined by immunohistochemistry.
对照组心脏标本中可见瘢痕组织；心肌细胞结蛋白染色阴性，肌钙蛋白i染色阳性。
Scar tissue was seen in the control group, and desmin was negative and Troponin I was positive in cardiomyocytes.
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