The major component of high-density lipoprotein (HDL, sometimes known as "good cholesterol"), apolipoproteinA-I, consists of a kinked helix about 12.5 nanometers in its longest dimension.
高密度脂蛋白（HDL）的重要组成部分阿朴脂蛋白由一个最大尺寸为12.5纳米的螺旋结构扭结而成。
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The drop in apolipoprotein II in the long walkers was matched by a rise in the blood level of apolipoproteinI, a "good" fat that is associated with unclogged arteries.