人类4号染色体的DNA含量占人类基因组DNA总量的6.5%,约编码5000～10000个基因。如同目前在其他染色体上的分子遗传学研究状况一样,4号染色体上能被识别的基因只占很少一部分。在第八届人类基因制图会议上,正式定位于4号染色体上的位点共有69个,这些位点包括某些结构蛋白和酶的基因、假基因、脆性位点、细胞表面抗原以及只有座位符号而暂未定名的所 Human chromosome 4 DNA content of human genomic DNA accounted for 6.5% of the total, encoding about 5000 to 10000 genes. As with the current state of molecular genetics on other chromosomes, only a small percentage of the genes identified on chromosome 4 are present. At the Eighth Human Genetographing Conference, there were 69 sites that were officially located on chromosome 4, including genes for certain structural proteins and enzymes, pseudogenes, fragile sites, cell surface antigens, and only loci Symbol and temporarily undetermined place