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Nat Genet. 1994 Mar;6(3):293-7.

Mutations in the gamma 2 chain gene (LAMC2) of kalinin/laminin 5 in the junctional forms of epidermolysis bullosa.

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Department of Dermatology, Jefferson Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania 19107.


Junctional epidermolysis bullosa (JEB) is an autosomal recessive disorder characterized by blister formation within the dermal-epidermal basement membrane. Genes for the lamina lucida protein, kalinin/laminin 5, have been proposed as candidates for some forms of JEB, based on immunofluorescence analysis recognizing kalinin epitopes. We studied the cDNA of laminin gamma 2 chain for mutations in JEB using heteroduplex analysis. One patient showed a homozygous splice site mutation while another was heterozygous for a deletion-insertion, resulting in a premature termination codon in one allele. Our data implicate mutations in the laminin gamma 2 chain gene (LAMC2) in some forms of JEB.

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