Zenker, Martin SOS1 is the second most common Noonan gene but plays no major role in cardio-facio-cutaneous syndrome. [electronic resource] - Journal of medical genetics Oct 2007 - 651-6 p. digital Publication Type: Letter; Research Support, Non-U.S. Gov't ISSN: 1468-6244 Standard No.: 10.1136/jmg.2007.051276 doi Subjects--Topical Terms: Amino Acid SequenceBody HeightConstriction, PathologicFemaleHeart Diseases--congenitalHeterozygoteHumansMaleMolecular Sequence DataNoonan Syndrome--geneticsSOS1 Protein--geneticsSequence Homology, Amino AcidSkin Diseases--geneticsSyndromeras Guanine Nucleotide Exchange Factors--metabolism