求翻译：β折叠层并不是平的，因为侧链的存在使得它看上去像手风琴一样波纹起伏。（英语pleated）这样每一股会更紧密排列，氢键更容易建立。氢键的距离为7埃。在蛋白质结构中β折叠通常会用箭头表示。肽链的氮端在同侧为顺式，两残基间距为0.65nm；不在同侧为反式，两残基间距为0.70nm。反式较顺式平行折叠更加稳定。是什么意思？

β-sheet layer is not flat, because the presence of side chain makes it look like as accordion bellows and downs. (English pleated) that each share will be more closely packed, hydrogen bonds more easily established. Hydrogen bond distance of 7 angstroms. In the β-sheet protein structure is usually i

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beta The folding level is not even, because the side chain existence causes it to look at likely the accordion same ripple fluctuation.(English pleated) each can be closely packed like this, the hydrogen bond is easier to establish.The hydrogen bond distance is 7 Egypt.Beta The fold usually can use

Beta collapse layer is not flat, because side-chain makes it look like an accordion as ripples of ups and downs. (English pleated) per share are more closely arranged, hydrogen bonds more easily established. Hydrogen-bond distance is 7 angstroms. Beta collapse in the protein structure is usually ind

Beta collapse layer is not flat, because side-chain makes it look like an accordion as ripples of ups and downs. (English pleated) per share are more closely arranged, hydrogen bonds more easily established. Hydrogen-bond distance is 7 angstroms. Beta collapse in the protein structure is usually ind