How, though, would a DNA-degrading enzyme distinguish between the two? Arber hypothesized that bacterial cells might express two types of enzymes: a restriction enzyme that recognizes and cuts up ...

Anyone who suffers from a hereditary, genetically-determined digestive enzyme limitation like lactose or fructose intolerance ...

How, though, would a DNA-degrading enzyme distinguish between the two? Arber hypothesized that bacterial cells might express two types of enzymes: a restriction enzyme that recognizes and cuts up ...

VOICEOVER: Enzymes of the digestive system. Three key types of enzymes in different parts of our digestive system help break down the food to provide the energy our body needs to grow and repair.

VOICEOVER: Enzymes of the digestive system. Three key types of enzymes in different parts of our digestive system help break down the food to provide the energy our body needs to grow and repair.