title: Interaction of tetrapyrrolic rings with rhodamine 110 and 123 and with rhodamine 110 derivatives bearing a peptidic side chain.
abstract: Rhodamines 110 and 123, and rhodamine 110 linked via peptide bonds to Arg, Cbz-Arg and Cbz-Ile-Pr-Arg interact with free base porphyrins or cytochrome C. Rhodamines 110 and 123 essentially form 1:1 complexes while the other derivatives form 2:1 complexes. The possible biological implications of these results are discussed.
mesh_terms: D000595:Amino Acid Sequence; D003574:Cytochrome c Group / Q000378:metabolism; D008433:Mathematics; D020112:Rhodamine 123; D012235:Rhodamines / Q000378:metabolism*; D013050:Spectrometry, Fluorescence; D013053:Spectrophotometry; D013329:Structure-Activity Relationship; D014966:Xanthenes / Q000378:metabolism*
chemical_list: D003574:Cytochrome c Group; D012235:Rhodamines; D014966:Xanthenes; C049025:rhodamine 110; D020112:Rhodamine 123