Stratification specific keratins present in gingival epithelium are
**Core Concept**
The stratification of keratins in oral epithelium is crucial for maintaining the integrity and function of the gingiva. **Keratins**, a family of intermediate filament proteins, are expressed in a specific pattern in different layers of the epithelium, allowing for the classification of oral epithelial cells into distinct types.
**Why the Correct Answer is Right**
The correct answer is related to the specific type of keratin expressed in the gingival epithelium. **Keratin 4** and **Keratin 13** are the stratification-specific keratins present in gingival epithelium. These keratins play a vital role in maintaining the structural integrity and function of the gingival epithelium. They are specifically expressed in the suprabasal layer of the gingival epithelium, which is essential for the protection of the underlying connective tissue and the maintenance of oral health.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because Keratin 5 and Keratin 14 are primarily expressed in the basal layer of the oral epithelium, not in the suprabasal layer of the gingival epithelium.
**Option B:** This option is incorrect because Keratin 6 and Keratin 16 are primarily expressed in the suprabasal layer of the oral epithelium, but not specifically in the gingival epithelium.
**Option C:** This option is incorrect because Keratin 18 and Keratin 8 are primarily expressed in the simple epithelia, such as the lining of the gastrointestinal tract, not in the stratified epithelium of the gingiva.
**Clinical Pearl / High-Yield Fact**
Remember that the stratification-specific keratins in oral epithelium, including Keratin 4 and Keratin 13, play a crucial role in maintaining the structural integrity and function of the gingival epithelium. This is essential for the prevention of diseases such as gingivitis and periodontitis.
**Correct Answer:** C. Keratin 18 and Keratin 8 are primarily expressed in the simple epithelia, such as the lining of the gastrointestinal tract, not in the stratified epithelium of the gingiva.