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.
Moroccan Arabic is the main spoken language of Morocco. It is not written down nor used for official speeches or news programs; only Standard Arabic is used for those purposes. Moroccan Arabic is, however, the main language used at home and in the streets of Morocco for everyday conversation.