Genetic and Biochemical Aspects of Keratin Synthesis by Hair Follicles

The review article discussed the genetic and biochemical aspects of keratin synthesis by hair follicles, highlighting the importance of gene regulation in the differentiation of hair follicle matrix cells and normal hair growth. It was noted that keratin genes are organized in clusters within the genome, typically ranging from 5-10 kb. The study identified two keratin intermediate filament (IF) gene families and five keratin-associated protein (KAP) gene families, some of which have been mapped. The proximity of these clusters suggested that "global" regulatory domains might control their expression, indicating a coordinated mechanism in keratin synthesis essential for hair development.