The second was that the melanosomes in her feathers were always embedded in the keratin of which the feather is made .
第二点是,羽毛中的黑素体总是镶嵌在组成羽毛的角蛋白中。
Composed of keratin , lipids and the pigments that give them their beautiful brilliant colors , feathers are particularly fascinating given the amazing work that they do .
羽毛中包含有角质,油脂以及为它们带来斑斓色彩的色素,羽毛所起到的作用让人惊叹。
Your eyes need to be transparent , however ; they can 't be covered by a layer of dead cells and keratin .
然而,眼睛却需要透明的保护层;在眼睛表面不能覆盖有死细胞或者角蛋白。
Nails , on both the fingers and the toes , are made of keratin , the same stuff our hair contains , only denser and harder .