Separating the human hemoglobin from pig hemoglobin is a simple process, according to John Logan, vice president in charge of research.

PolyHeme, a blood substitute solution of chemically modified human hemoglobin.

Using genetic engineering techniques, biologists have created pigs that produce human hemoglobin, the essential oxygen-carrying component of blood.

Pigs are used because their hemoglobin closely resembles human hemoglobin.

The main advantages of making human hemoglobin in animals are related to red blood cells.

This will make the production of large amounts of human hemoglobin in swine relatively easy.

The number of successful transgenic pigs or on the amount of human hemoglobin the successful ones produce?

Some researchers experimented with using pig's blood as a substitute and genetically altering pigs to produce human hemoglobin.

Other examples are mimetic forms of butterflies (see mimicry), and human hemoglobin and blood types.

For instance, pigs that produce human hemoglobin have been created.