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

血酸与酶的结合，使胶原中的脯酸残基上增加了羟基。

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酸，这基酸在枣和其他水果中含量丰富。

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.

他证明了羟醛缩化反应可以被基酸--脯酸催化。最重要的是，这保留了酶介导反应的对映体纯度。

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，胶原蛋白主要由甘酸和脯酸组成，这是我们体内最丰富的蛋白质之，占我们总蛋白质总量的25%。