Sequence analyses of Type I and Type II chains in human hair and epithelial keratin intermediate filaments: promiscuous obligate heterodimers, Type II template for molecule formation and a rationale for heterodimer formation.


Sequence comparisons have been undertaken for all hair and epithelial keratin IF chains from a single species--human. The results lead to several new proposals. First, it is clear that not only is the chain structure of the molecule an obligate heterodimer but promiscuous association of Type I and Type II chains must occur in vivo. Second, the higher… (More)


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