NCIt definition : A complex mutation in the BLM gene consisting of a 6 base pair deletion of the nucleotide
sequence ATCTGA encompassing nucleic acid positions 2207 through 2212 accompanied
by an insertion of 7 base pairs with the sequence TAGATTC.;
NCIt note : This BLM gene mutation is common in patients from Ashkenazi Jewish ancestry. The deletion
of ATCTGA and insertion of TAGATTC causes the insertion of the four codons encoding
leucine, aspartic acid, serine and arginine (LDSR) after the threonine at amino acid
position 735; the arginine codon is followed by a stop codon. (Cell. 1995; 8:655-666
and Ref_Seq.);