英语释义

1. any of various sulfur-containing, fibrous, acidic or basic proteins chiefly of epithelial cells and tissues that are relatively insoluble and resistant to degradation, form filaments which assemble into bundles to provide structural support, and are the primary component of hair, nails, horns, claws, hooves, quills, scales, feathers and the epidermal layer of skin Note: In addition to its structural properties, keratin also plays a role in cell growth and proliferation, cellular transport of substances, and intercellular communication.
Rhino horn is not actually horn but densely compacted fibers of keratin, a protein found in hair and fingernails.
— Maryanne Vollers Wool fibers are composed of keratin proteins bundled into microfibrils.
— A. Goho — compare keratinocyte

2. any of various sulfur-containing fibrous proteins that form the chemical basis of horny epidermal tissues (as hair and nails) and are typically not digested by enzymes of the gastrointestinal tract — see pseudokeratin

片语

hair keratinous layer毛角质层

keratinous degeneration[生化]

corneous角质的；似角的

keratinous plug角栓

keratinous cyst角质化囊肿

non-keratinous fibre非角蛋白质纤维

keratinous model抗角化作用

keratinous material角蛋白饲料

英汉例句

• 「Wet」 keratin is different from the mature (orthokeratotic) keratinous squames seen in epidermoid or dermoid cysts.

  湿角化蛋白不同于表皮囊肿和皮样囊肿的成熟角化鳞状上皮。