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△人体双倍体细胞共含23对染色体,其DNA总长度达6英尺以上,重量约10~(-11)克,相当于0.925×10~(10)碱基对,包含在直径小于1/4万英寸的细胞核内,其所含的结构基因数约5万左右,这些基因通过转录合成各种酶、多肽激素、结构蛋白等,调控人体各项生理功能的表达。但上述可转录部分却只占人体细胞DNA总长度的不到10％,其余部分的功能究竟如何,尚处于“假设”阶段,有待今后证实。
△ human diploid cells contain a total of 23 pairs of chromosomes, the total length of DNA more than 6 feet, weighing about 10 ~ (-11) grams, equivalent to 0.925 × 10 ~ (10) base pairs, included in the diameter of less than 1 / In the 40,000-inch nucleus, the number of structural genes contained therein is about 50,000, and these genes regulate the expression of various physiological functions by transcription and synthesis of various enzymes, polypeptide hormones, structural proteins and the like. However, the above transcribable part only accounts for less than 10% of the total length of human cell DNA. What is the function of the remaining part is still in the “hypothetical” stage and remains to be confirmed in the future.