PMID- 14234778 OWN - NLM STAT- MEDLINE DCOM- 19961201 LR - 20210526 IS - 0021-9193 (Print) IS - 1098-5530 (Electronic) IS - 0021-9193 (Linking) VI - 88 IP - 5 DP - 1964 Nov TI - ACRIDINE ORANGE BINDING BY MICROCOCCUS LYSODEIKTICUS. PG - 1249-56 AB - Beers, Roland F., Jr. (Johns Hopkins University, Baltimore, Md). Acridine orange binding by Micrococcus lysodeikticus. J. Bacteriol. 88:1249-1256. 1964.-Micrococcus lysodeikticus cells bind acridine orange (AO) reversibly. The adsorption isotherm is consistent with a highly cooperative-type binding similar to that observed with polyadenylic acid. The cells exhibit a strong buffering action on the concentration of free AO which remains constant (1 mug/ml) over a range from 5 to 95% saturation of the cells by AO. The cells stain either fluorescent orange or green. The fraction stained orange is directly proportional to the quantity of dye adsorbed, indicating that these cells bind a fixed amount of AO (10% of dry weight). The green-stained cells contain less than 1% of the AO bound to orange-stained cells. The results suggest that the abrupt increase in amount of AO bound by the orange-stained cells occurs when the concentration of free AO reaches a threshold concentration. Similar results were obtained with Bacillus cereus. Mg increases the free AO concentration and the extent of binding capacity of the cells. FAU - BEERS, R F Jr AU - BEERS RF Jr LA - eng PT - Journal Article PL - United States TA - J Bacteriol JT - Journal of bacteriology JID - 2985120R RN - 0 (Acridines) RN - 0 (Buffers) RN - 0 (Coloring Agents) RN - F30N4O6XVV (Acridine Orange) SB - OM MH - *Acridine Orange MH - *Acridines MH - Adsorption MH - *Bacillus cereus MH - *Bacteriological Techniques MH - Buffers MH - *Coloring Agents MH - *Fluorescence MH - *Micrococcus MH - *Micrococcus luteus MH - *Microscopy MH - *Microscopy, Fluorescence MH - *Research MH - *Staining and Labeling PMC - PMC277401 OTO - NLM OT - *ACRIDINES OT - *ADSORPTION OT - *BACILLUS CEREUS OT - *BACTERIOLOGICAL TECHNICS OT - *BUFFERS OT - *EXPERIMENTAL LAB STUDY OT - *MICROCOCCUS OT - *MICROSCOPY, FLUORESCENCE OT - *STAINS AND STAINING EDAT- 1964/11/01 00:00 MHDA- 1964/11/01 00:01 PMCR- 1964/11/01 CRDT- 1964/11/01 00:00 PHST- 1964/11/01 00:00 [pubmed] PHST- 1964/11/01 00:01 [medline] PHST- 1964/11/01 00:00 [entrez] PHST- 1964/11/01 00:00 [pmc-release] AID - 10.1128/jb.88.5.1249-1256.1964 [doi] PST - ppublish SO - J Bacteriol. 1964 Nov;88(5):1249-56. doi: 10.1128/jb.88.5.1249-1256.1964.