As specialized lipid rafts, caveolae are present on many types of mammalian cells, particularly on endothelial cells, adipocytes and smooth muscle cells.

• 膜窖是脂筏的一种特殊类型,在哺乳动物的内皮细胞、脂肪细胞及平滑肌细胞质膜上分布尤为丰富。