- Asp1424Asn MYH9 mutation results in an unstable protein responsible for the phenotypes in May-Hegglin anomaly/Fechtner syndrome. Deutsch, S., Rideau, A., Bochaton-Piallat, M.L., Merla, G., Geinoz, A., Gabbiani, G., Schwede, T., Matthes, T., Antonarakis, S.E., Beris, P. Blood (2003)