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.
Levantine Arabic has no official status in the countries where it is spoken. It is, however, the de facto national working language in Lebanon. The official language in these countries is Modern Standard Arabic (MSA) .evantine Arabic is rarely written, since Modern Standard Arabic is normally used for written communication. It is occasionally used for captions in cartoons, and transcriptions of spoken language, such as songs, plays, and dialogs.