A strategy for detection of mutations in CLN3, the gene for Batten dis
ease or juvenile onset neuronal ceroid lipofuscinosis, has been devise
d using a technique which detects conformation polymorphisms and direc
t sequencing of genomic DNA fragments. We define two mutations found u
niquely in Finnish patients, one a large deletion (2.8 Kb), the other
a point mutation affecting the 5'splice donor site of an intron.