Group of people % people with lactose intolerance
Americans of European descent
12%
African Americans
75%
Native Americans 100%Mexican Americans
55%
English 10%Greeks 50%Asian Americans 95%
Most people in the world…most mammals in the world…
stop making this protein after they are weaned.
Why?
JasonMom Tricia
Why does Jason have none of this protein?
Why do Mom and Tricia have less lactase?
Gel electrophoresis:Lactase samples from 4 people
JoelNumber of amino acids Origin 3500 3000
2500
2000
1500
1000
500
0