11. Thalassemias, in contrast, usually result in underproduction of normal globin proteins, often through mutations in regulatory genes . 12. This means that many regulatory genes can be turned on for pathways like muscle repair and growth. 13. Applied to eukaryotes, the term refers to any group of non-contiguous genes controlled by the same regulatory gene . 14. The extent of regulatory gene disparities for prodynorphin, between human and primates, has gained the attention of scientists. 15. This allows c-Myc to take advantage of EZH2's silencing capabilities to prevent regulatory genes from acting upon it. 16. Presumably human regulatory genes are more sophisticated and can construct greatly more complex structures like the human brain. 17. Although the main human genes have recognizable counterparts in fish, the regulatory genes seem to be different, Collins said. 18. Human regulatory genes and baboon regulatory genes are so similar that for purposes of the experiment they are interchangeable. 19. One of the regulatory genes Krumlauf is studying also appears to play a role in the development of leukemia. 20. Human regulatory genes and baboon regulatory genes are so similar that for purposes of the experiment they are interchangeable.