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Biomedical subjects

F Heitz

Publications and source records attributed to F Heitz.

At least 109 records · Page 6Linked to original sources
PubMed1980

Poly (d trp-L Leu), poly (D Phe-L Leu) and poly (D Val-L Val-D Val-L Ala) as model polymers for the elucidation of the gramicidin a conformation.

From infrared observations it is concluded that the conformation of poly (D Trp-L leu), poly (D Leu-L Trp), poly (D Phe-L leu) and poly (D val-L Val-D Val-L Ala) wich are model polymers of Gramicidin A is the same as one species of the antibiotic. Diffraction investigations indicate that poly-(D Phe-L Leu) and poly (D Val-L Val-D Val-L Ala) have a helical conformation which is most probably the pi DL 8 helix.

Gramicidin↗
PubMed1979

270-MHz nuclear-magnetic-resonance study on linear gramicidin A in dimethylsulfoxide. A new interpretation.

On the basis of the finding of two sets of coupling constants (8.8 Hz and 6.7 Hz) in the 270-MHz proton magnetic resonance spectra of linear Gramicidin in dimethylsulfoxide and the comparison of its infrared spectrum with those of known conformations of alternating poly(gamma-benzyl-D-glutamate--gamma-benzyl-L-glutamate), it is proposed that the antibiotic has an LD-ribbon structure.

Dimethyl Sulfoxide↗