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    Glossary Keratin 19

    protein in epithelial cells used as a cancer biomarker

    Keratin 19 (KRT19 or CK19) is a type of protein found in the epithelial cells that line the surfaces and cavities of organs. It plays a crucial role in maintaining the structural integrity of these cells. In medical diagnostics, KRT19 is often used as a biomarker to detect certain types of cancers, as its expression levels can be indicative of tumor presence and progression.

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    Research 10 of 1000+

    1. Keratin 19 as a biochemical marker of skin stem cells in vivo and in vitro: keratin 19 expressing cells are differentially localized in function of anatomic sites, and their number varies with donor age and culture stage Journal of Cell Science · 1996 · 441 citations
    2. Keratin 19: Predicted Amino Acid Sequence and Broad Tissue Distribution Suggest it Evolved from Keratinocyte Keratins. Journal of Investigative Dermatology · 1989 · 238 citations
    3. The Tissue-dependent Keratin 19 Gene Transcription Is Regulated by GKLF/KLF4 and Sp1 Journal of Biological Chemistry · 2000 · 119 citations
    4. The Type I Keratin 19 Possesses Distinct and Context-dependent Assembly Properties Journal of Biological Chemistry · 1998 · 46 citations
    5. Transient expression of keratin 19 is induced in originally negative interfollicular epidermal cells by adhesion of suspended cells. PubMed · 2005 · 25 citations
    6. Genomic Organization and Amplification of the Human Keratin 15 and Keratin 19 Genes Biochemical and Biophysical Research Communications · 2000 · 12 citations
    7. Characterization of Epithelial Hair Follicle Stem Cells in Lichen Planopilaris and Folliculitis Decalvans Through Keratin 19 Expression American Journal of Dermatopathology · 2025
    8. Characterization of Human KAP24.1, A Cuticular Hair Keratin-Associated Protein with Unusual Amino-Acid Composition and Repeat Structure 2007 · 51 citations
    9. Identification of the Ovine Keratin-Associated Protein 21-1 Gene and Its Association with Variation in Wool Traits Animals · 2019 · 7 citations
    10. The keratin 19 promoter is potent for cell-specific targeting of genes in transgenic mice Gastroenterology · 2001 · 66 citations
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    Learn 4 of 6

    1. Azelaic Acid Acid used in acne and rosacea creams
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    Community 10 of 40

    1. Seeking Supplement Advice for Keratin Enhancement and Hair Flattening Community · 16 Feb 2026
    2. Let's talk keratin products and hair loss Reddit · 22 Sept 2025
    3. My brain absorbing the assorted off label drugs I put near it on a daily basis just for maximum keratin production Reddit · 29 Nov 2024
    4. Keratin fibers vs. Gossypium Herbaceum Hair fibers Reddit · 31 Aug 2024
    5. Is Biotin or Keratin shampoo better for hair health/growth Reddit · 4 May 2024
    6. Question about seborrheic dermatitis and keratin Reddit · 16 May 2019
    7. Apparently, Keratin Microsphere products are already on the market. Gonna give it a college try, wish me luck! Reddit · 20 Sept 2024
    8. Is it safe to get keratin treatment on transplanted hair? Reddit · 10 Aug 2024
    9. Male - 25 y.o - gulfs slowly fading like my father’s - topical minoxidil, soon starting fin + keratine supplement Community · 15 Jul 2024
    10. Keratin microspheres - breakthrough Reddit · 6 Mar 2024
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