Smectite interactions with flavomononucleotide.
Adsorption isotherms and UV-visible and Mossbauer spectroscopic data point to specific interactions between flavomononucleotide (FMN) and Fe(3+)-smectite.  The maximum amount of FMN adsorption was 0.3 mmole/g of Fe(3+)-smectite giving a 1:1 molar proportion of Fe3+ and FMN.  The results suggest a Fe(3+)-FMN complex residing at the smectite surface.  Other homoionic smectites (Cu2+, Zn2+, and Ca2+) exhibited lower levels of adsorption and less apparent specific interaction.
Mortland
M M
MM
Department of Crop and Soil Sciences, Michigan State University, East Lansing 48824, USA.
Lawless
J G
JG
Hartman
H
H
Frankel
R
R
D000327:Adsorption; D000538:Aluminum Silicates / Q000737:chemistry*; D002118:Calcium / Q000737:chemistry; D000077215:Clay; D003300:Copper / Q000737:chemistry; D005415:Flavins / Q000493:pharmacokinetics*; D005765:Gastrointestinal Agents; D019015:Geologic Sediments / Q000737:chemistry; D007474:Ion Exchange; D007501:Iron / Q000737:chemistry*; D012256:Riboflavin / Q000493:pharmacokinetics; D017640:Silicates; D015204:Spectroscopy, Mossbauer; D014466:Ultraviolet Rays
D000538:Aluminum Silicates; D005415:Flavins; D005765:Gastrointestinal Agents; D017640:Silicates; D003300:Copper; C033214:Smectite; D007501:Iron; D002118:Calcium; D000077215:Clay; D012256:Riboflavin