Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) C T Chung and S L Niemela and R H Miller,One-step preparation of competent Escherichia coli: transformation and storage of bacterial cells in the same solution.,Proceedings of the National Academy of Sciences,0027-8424,Proceedings of the National Academy of Sciences,1989-04,86,7,2172-2175,https://cir.nii.ac.jp/crid/1363107371373815808,https://doi.org/10.1073/pnas.86.7.2172