Science: v.1-v.219Moses King, 1967 |
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Page 1142
v.1-v.219. code . Such mutations are called " re- verse " mutations ; they restore a gene function that has become altered or abolished by the first mutation . Since reverse mutations require a very precise chemical change , they are ...
v.1-v.219. code . Such mutations are called " re- verse " mutations ; they restore a gene function that has become altered or abolished by the first mutation . Since reverse mutations require a very precise chemical change , they are ...
Page 1143
... mutations that they themselves have produced , while other mutagens - able to change adenine - thy- mine into guanine - cytosine ( see below ) -may do so . In addition to gene mutations , alkyl- ating agents also produce deletions and ...
... mutations that they themselves have produced , while other mutagens - able to change adenine - thy- mine into guanine - cytosine ( see below ) -may do so . In addition to gene mutations , alkyl- ating agents also produce deletions and ...
Page 1146
... mutations in free bacterial DNA . In vitro , it reacts preferentially with cyto- sine . The pH dependence of this reac- tion parallels that of mutation frequen- cy in extracellularly treated bacterio- phage , suggesting that mutations ...
... mutations in free bacterial DNA . In vitro , it reacts preferentially with cyto- sine . The pH dependence of this reac- tion parallels that of mutation frequen- cy in extracellularly treated bacterio- phage , suggesting that mutations ...
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AAAS Academic activity American amino acids analysis animals antibody associated behavior Biol biology California carotenoid cells Center centromeres cerumen chemical chemistry Chlorella chromosome concentration cores Department depth effects electron environment enzyme experimental experiments federal field fraction genetic guanine Health human hydrazine ibid illus increase indicate Institute instrument kyanite laboratory leukemia light marine measurements ment mice molecular mutagenic mutations Nalgene National normal observed OHIO STATE UNIVERSITY optical organisms papers particles percent physical position present Press problems Proc produced protein pteridine Purkinje cells radiolarian range recorded References and Notes response samples Science scientific scientists sediments social specific staurolite structure surface symposium tained techniques temperature tion tissue tive tridymite ture United Univ University uracil values York