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Polymerase chain reaction analysis on agarose gel showing expanded alleles obtained by the CGG linker screening of blood spots. Samples were loaded from lanes 1 to 7 as follows: III-3, III-4, III-5, II-4, C1 (gray zone control 30, 54 CGG), C2 (normal control), C3 (full mutation control). Lane 8 was a negative control (no DNA). A DNA size marker is shown in lane 9.
