MM is the normal genotype.
Alpha-1 at MUSC – Genetic Counseling
People with the MM genotype do not have alpha-1 antitrypsin deficiency, and do not have increased risks related to this condition.
This is the normal genotype. A person with two M alleles does not have alpha-1 antitrypsin deficiency and is not a carrierAn Alpha-1 Carrier is a person who has one normal ATT gene (M) and one defective AAT gene (usually S or Z). It does NOT mean you cannot get sick. More. A person with the MM result does not have increased risks related to alpha-1 antitrypsin deficiency.
Alpha-1 Alleles – AlphaNet