Because there is an amino acid substance called cytochrome C in all biological cells, the amino acid difference between human and pig cytochrome C is small, so the genes are similar. In fact, chimpanzees and humans have the most similar genes. The similarity between humans and mammals is above 95%, regardless of species, such as pigs, mice, humans and monkeys.

There are about 30,000 genes in human beings. With the distance of genetic relationship, the gene sequences will be very different, and the corresponding coding proteins will be different. Therefore, we can see that people look different from other animals. However, there are many similarities between human and other animals' genes, for example, genes are all broken; Genes are all encoded by nucleic acids and so on.

Extended data:

The destruction of human life by organ diseases may soon be contained. A study by American biotechnology company eGenesis may completely change human health and quality of life, which breaks through the influence of porcine endogenous retrovirus (Pervs) on xenotransplantation. In the future, a large number of organs needed by human beings will come from virus-free pigs that can be propagated in batches.

Insufficient organ transplantation is one of the biggest challenges facing modern medicine. Pig viscera is similar in size and function to human, so it becomes the most promising donor of human diseased organs. However, a terrible virus-porcine endogenous retrovirus has dashed this hope, because it may cause fatal harm to human beings and lead to the spread of the epidemic among human beings.

Baidu encyclopedia-organ