geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Conformational studies of cyclol phe l pro gly l pro 2 by carbon 13 nmr


, : Conformational studies of cyclol phe l pro gly l pro 2 by carbon 13 nmr. Chemical & Pharmaceutical Bulletin (Tokyo) 39(6): 1617-1619

The 13C-NMR spectrum (Fig. 2.1) of cyclooctapeptide cyclo(L-Phe-L-Pro-Gly-L-Pro)2 (A) in CDCl3 suggested that its conformation involved the coexistence of two kinds of C2-symmetric conformation with trans-trans-trans-trans and cis-trans-trans-trans forms. Adding 0.5 equivalent of CsSCN or one equivalent of DL-Phe-Ome .cntdot. HCl to the solution of cyclopeptide (A) in CDCl3 yielded 13C-MR spectra (Fig. 2.2 and Table I) which suggested a single C2-symmetric conformation with trans-trans-trans-trans form, resulting from the formation of complexes with CsSCN or DL-Phe-OMe .cntdot. HCl. The 13C-NMR spectrum of complexes of A with DL-Phe-OMe .cntdot. HCl displayed separate resonances2) for Cy, C0,1) Cm,1) C.alpha., and C.beta. of D-Phe-OMe .cntdot. HCl and L-Phe-OMe .cntdot. HCl.

US$29.90


Other references

Sharma, J.P.; Chauhan, R.P.S., 1994: Urea transformation in saline and sodic soils of the semi-arid region of Agra. The transformation of urea was studied in surface saline, saline-sodic and sodic soils (Inceptisols) from the Agra region, India. Urea was applied at rates of 0, 50, 100, 150 and 200 mg N/kg soil and the soils were incubated for six weeks at 30 de...

Van Erps P.M.; Dourcy B.Z.; Denis L.J., 1990: Local hyperthermia in benign prostatic hyperplasia bph. Journal of Urology 143(4 SUPPL): 414A

Delbeke, F.T.; Debackere, M., 1991: Urinary concentrations of codeine and morphine after the administration of different codeine preparations in relation to doping analysis. A capillary GC method with nitrogen-specific detection is described for the analysis of codeine and morphine in urine. Both drugs were determined after enzymatic hydrolysis of the urine. Morphine was derivatized with trifluoroacetic anhydride. For...

Papdiwal, P.B., 1980: Bacterial leafspot disease of Cissus pallida Planch. Symptoms of the disease, caused by the new sp. Xanthomonas pallidae (described), include circular to irregular coalescing black lesions surrounded by a pale yellow halo. The pathogen did not infect 4 other plants (Butea monosperma, Eriodendron pen...

Kufe, D.W.; Spriggs, D.R.; Griffin, J.D., 1987: Pharmacologic studies of low-dose and high-dose continuous infusion cytosine arabinoside. Seminars in Oncology 14(2 Suppl 1): 149-158

Czaikowski, P.M., 1969: The radiation stress of the bones in radiotherapy of uterus carcinoma. Strahlentherapie 138(3): 337-345

Rose, T.F., 1954: Volvulus of the jejunum occurring in bowel with a normal mesentery: a report of two cases. Medical Journal of Australia 41(1 15): 557-558

Hayman, L.L.; Berra, K.; Fletcher, B.; Miller, N.Houston.; Himmelfarb, C.Dennison., 2017: Promoting Cardiovascular Health Worldwide: The Global Cardiovascular Nursing Leadership Forum. Journal of Cardiovascular Nursing 32(5): 426-427

Azmi F.; Gangemi J.D.; Ghaffar A.; Mayer E.P., 1988: Immunosuppression by propionibacterium acnes studies on the possible mechanisms. FASEB Journal 2(4): ABSTRACT 2256

Grishchenko, Om, 1982: Botanical anomalies as a prospecting criterion for oil and gas deposits Plant communities. Soviet journal of ecology 13(1): 18-21