1.Previous
3.Next

or even more vital developmental roles, especially in controlling the patterns of gene expression between developmental stages. The forerunner of steroid hormones is cholesterol that vertebrates can synthesize. In contrast, insects need to take up cholesterol in their diet. In 20E biosynthesis, a series of hydroxylation takes place and the genes that encoded the enzymes for catalyzing the hydroxylation were first identified in Drosophila. Insects have been around since about 500 million years before the

1.Previous
3.Next