Table 1.

Ferritin level

	FtL (ng/mg prot.)	FtH (ng/mg prot.)
CTR1	11 ± 1.5	162 ± 12.7
CTR2	19 ± 7.0	116 ± 17.0
CTR3	10 ± 3.0	133 ± 23.0
E104X	Undetected	148 ± 23.0
E104X-Lwt	14 ± 1.0	135 ± 33.0

L (FtL) and H (FtH) chain ferritin was analyzed in cell extracts of fibroblasts from three different healthy control probands, our patient (E104X), and patient fibroblasts with forced FtL expression (E104X-Lwt) by an ELISA. The results are shown as nanograms/milligram of ferritin of total soluble proteins. The values are the means and SD of three independent experiments.