- UFD1L, a developmentally expressed ubiquitination gene, is deleted in CATCH 22 syndrome. Pizzuti, A., Novelli, G., Ratti, A., Amati, F., Mari, A., Calabrese, G., Nicolis, S., Silani, V., Marino, B., Scarlato, G., Ottolenghi, S., Dallapiccola, B. Hum. Mol. Genet. (1997)