Mutations in the MT-CYB gene found in mitochondrial DNA can cause mitochondrial complex III deficiency. When caused by mutations in this gene, the condition is usually characterized by muscle weakness (myopathy) and pain, especially during exercise (exercise intolerance).
Hejazi Arabic, also known as Western Arabian Arabic, is a variant of the Arabic language spoken predominantly in the western region of Saudi Arabia. The language is spoken by approximately 8 million Saudi nationals, as of the last census.
Arabic is one of the world's great languages. Its graceful script, magnificent style and rich vocabulary give the language a unique character and flavour. Arabic is the largest member of the Semitic language family, which also includes languages like Hebrew and Aramaic. Arabic is also an important language in many countries bordering on the Arab World, like Mali, Niger, Chad, Eritrea, Djibouti, Ethiopia and Somalia. 2  There are also Arabic-speaking populations in parts of southern Turkey and southwestern Iran.