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

抗坏血酸与酶结合，使胶原中脯氨酸残基上增加羟基。

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

研究人员脯氨酸，这种氨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.

他证明羟醛缩化反应可以被一种氨基酸--脯氨酸催化。最重要是，这保留酶介导反应对映体纯。

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蛋白质之一，占我们总蛋白质总量25%。