1.The incorporation of Ascorbic acid with the enzyme, adds hydroxyl group on proline residue in collagen.

抗坏血酸与酶的结合，使胶原的脯氨酸残上增加了。

2.The researchers found a high concentration of the amino acid proline, which is abundant in dates and some other fruits.

研究人员发现了浓度的脯氨酸，这种氨酸在枣和其他水果丰富。

3.He showed that the aldol reaction can be catalysed by a single amino acid, proline. And, crucially, this retains the enantiomeric purity of the enzyme-mediated reaction.

他证明了醛缩化反应可以被一种氨酸--脯氨酸催化。最重要的是，这保留了酶介导反应的对映体纯度。

4.To start, collagen, comprised mainly of the amino acids glycine and proline, is one of the most abundant protein in our bodies, allocating roughly 25% of our total protein mass.

首先，胶原蛋白主要由甘氨酸和脯氨酸组成，这是我们体内最丰富的蛋白质之一，占我们总蛋白质总的25%。