常用的 DNA 底物，双链 DNA，从 lambda 噬菌体中分离得到。长度为 48,502 bp。Duplex DNA is isolated from bacteriophage lambda (cI857ind 1 Sam 7). Lambda DNA is 48,502 base pairs in length.

常用的 DNA 底物，双链共价闭合环状 DNA 分子，分子量为 3.50 x 106 daltons，长度为 5,386 bp。This is the double-stranded, covalently closed, circular form of ΦX174 RF I DNA (supercoiled). The molecular weight of ΦX174 RF I is 3.50 x 106 daltons and it is 5,386 base pairs in length.

常用的 DNA 底物，双链 DNA，从 lambda 噬菌体（在 dam- 大肠杆菌宿主菌中培养）中分离得到。该 DNA 对有 dam 甲基化活性的内切酶敏感。该 DNA 长度为 48,502 bp。Duplex DNA is isolated from bacteriophage lambda (cI857ind 1 Sam 7).The bacteriophage is grown in an E. coli host which is deficient in adenine methylase (dam-).This DNA gives complete digests with restriction endonucleases that are sensitive to dam methylation. Lambda DNA (N6-methyladenine-free) is 48,502 base pairs in length.

单链病毒 DNA，从 ΦX174 am3 cs70 噬菌体中分离得到；分子量为 1.70 x 106 daltons，长度为 5386 bp。 ΦX174 Virion DNA is the single-stranded viral DNA isolated from bacteriophage ΦX174 am3 cs70. It has a molecular weight of 1.70 x 106 daltons and is 5386 bases in length.

常用的 DNA 底物，双链 DNA，从 lambda 噬菌体中分离得到。长度为 48,502 bp。Duplex DNA is isolated from bacteriophage lambda (cI857ind 1 Sam 7). Lambda DNA is 48,502 base pairs in length.

常用的 DNA 底物，双链 DNA，从 lambda 噬菌体（在 dam- 大肠杆菌宿主菌中培养）中分离得到。该 DNA 对有 dam 甲基化活性的内切酶敏感。该 DNA 长度为 48,502 bp。Duplex DNA is isolated from bacteriophage lambda (cI857ind 1 Sam 7).The bacteriophage is grown in an E. coli host which is deficient in adenine methylase (dam-).This DNA gives complete digests with restriction endonucleases that are sensitive to dam methylation. Lambda DNA (N6-methyladenine-free) is 48,502 base pairs in length.

常用的 DNA 底物，双链共价闭合环状 DNA 分子，分子量为 3.50 x 106 daltons，长度为 5,386 bp。This is the double-stranded, covalently closed, circular form of ΦX174 RF I DNA (supercoiled). The molecular weight of ΦX174 RF I is 3.50 x 106 daltons and it is 5,386 base pairs in length.

常用的 DNA 底物，双链环状 DNA 分子，分子量为 3.50 x 106 daltons，长度为 5,386 bp。This is the double-stranded, nicked, circular form of ΦX174 DNA (relaxed form). The molecular weight of ΦX174 DNA is 3.50 X 106 daltons it is 5,386 base pairs in length.

单链病毒 DNA，从 ΦX174 am3 cs70 噬菌体中分离得到；分子量为 1.70 x 106 daltons，长度为 5386 bp。 ΦX174 Virion DNA is the single-stranded viral DNA isolated from bacteriophage ΦX174 am3 cs70. It has a molecular weight of 1.70 x 106 daltons and is 5386 bases in length.