BAIER: Now, does Secretary Clinton factor into this? SCHWEIZER: For that deal to go through, it needs federal government approval and one of those people that has to approve that deal is Secretary of State Hillary Clinton.
An antigen is any foreign substance which invades the body of an organism, while a pathogen is a living antigen (such as viruses or bacteria) which invade an organism. Many different kinds of white blood cells exist which are able to help the body fight foreign invaders in various ways.
Sometimes, expression of these genes hasan important effect on the host cell, altering it in novelways. The genetic alteration of a cellâs genome by the in-troduction of foreign DNA is called transformation. When the foreign DNA is contributed by a bacterial virus,the alteration is called phage conversion.