Ｒ－藻红蛋白（Ｒ－ＰＥ）从海洋红藻多管藻中分离获得，然后用扫描隧道显微镜对其结构进行了研究。结果表明当Ｒ－ＰＥ在基底高定向石墨（ＨＯＰＧ）上吸附时，大部分蛋白分子聚集在一起，少数单个的蛋白分子分布于ＨＯＰＧ的表面。进一步缩小扫描范围，可以清楚地观察到Ｒ－ＰＥ分子为圆盘状结构，但分子中央的孔洞不象Ｃ－藻蓝蛋白那样清晰，这是由于γ亚基位于分子的中央孔洞内。 R-phycoerythrin (R-PE) was isolated from the marine red algae Polychromatic algae, and its structure was studied by scanning tunneling microscope. The results showed that when R-PE was adsorbed on HOPG, most of the protein molecules clustered together, and a few individual protein molecules were distributed on the surface of HOPG. Further narrowing of the scan range clearly reveals that the R-PE molecule is disc-shaped, but the central hole in the molecule is not as clear as C-phycocyanin due to the presence of the gamma subunit in the central pore of the molecule.