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.
The Arabic language is one of the oldest and most wide spread languages. It is an official language in about 26 countries and the native language for more than 290 million people. The language itself is very rich and highly expressive, and it takes its pride from being the language of the Quran, Muslims' holy book.