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Robtin

$1,120

  • Brand : BIOFRON

  • Catalogue Number : BN-O1483

  • Specification : 98%(HPLC)

  • CAS number : 4382-34-7

  • Formula : C15H12O6 

  • Molecular Weight : 288.3

  • PUBCHEM ID : 90472843

  • Volume : 5mg

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Catalogue Number

BN-O1483

Analysis Method

HPLC,NMR,MS

Specification

98%(HPLC)

Storage

-20℃

Molecular Weight

288.3

Appearance

Powder

Botanical Source

This product is isolated and purified from the seeds of Cassia tora

Structure Type

Flavonoids

Category

Standards;Natural Pytochemical;API

SMILES

C1C(OC2=C(C1=O)C=CC(=C2)O)C3=CC(=C(C(=C3)O)O)O

Synonyms

7,2'-dihydroxyflavanone/3',4',5',7-tetrahydroxyflavanone/(2S)-7-Hydroxy-2-(3,4,5-trihydroxyphenyl)-2,3-dihydro-4H-chromen-4-one/4H-1-Benzopyran-4-one, 2,3-dihydro-7-hydroxy-2-(3,4,5-trihydroxyphenyl)-, (2S)-

IUPAC Name

(2S)-7-hydroxy-2-(3,4,5-trihydroxyphenyl)-2,3-dihydrochromen-4-one

Density

1.6±0.1 g/cm3

Solubility

Soluble in Chloroform,Dichloromethane,Ethyl Acetate,DMSO,Acetone,etc.

Flash Point

247.3±25.0 °C

Boiling Point

639.2±55.0 °C at 760 mmHg

Melting Point

InChl

InChI=1S/C15H12O6/c16-8-1-2-9-10(17)6-13(21-14(9)5-8)7-3-11(18)15(20)12(19)4-7/h1-5,13,16,18-20H,6H2/t13-/m0/s1

InChl Key

RZPNYDYGMFMXLQ-ZDUSSCGKSA-N

WGK Germany

RID/ADR

HS Code Reference

2932990000

Personal Projective Equipment

Correct Usage

For Reference Standard and R&D, Not for Human Use Directly.

Meta Tag

provides coniferyl ferulate(CAS#:4382-34-7) MSDS, density, melting point, boiling point, structure, formula, molecular weight etc. Articles of coniferyl ferulate are included as well.>> amp version: coniferyl ferulate

No Technical Documents Available For This Product.

PMID

2543974

Abstract

Mammalian aspartate transcarbamylase (ATCase; carbamoyl-phosphate:L-aspartate carbamoyltransferase, EC 2.1.3.2) is part of a 240-kDa multifunctional polypeptide called CAD, which also has carbamoyl-phosphate synthetase and dihydroorotase activities. We have sequenced selected restriction fragments of a Syrian hamster CAD cDNA that are clearly homologous to three prokaryotic ATCases. These studies, combined with previous sequence data, showed that the ATCase domain of CAD is encoded by 924 base pairs and has a mass of 34,323 Da and a pI of 9.8. While the bacterial pyrimidine biosynthetic enzymes are separate proteins, in mammals the ATCase domain is fused to the carboxyl end of the CAD chimera via a 133-amino acid (14-kDa) linker with an unusual amino acid composition, a pI of 10.2, and pronounced hydrophilic character. The fully active domain isolated from proteolytic digests was characterized by partial amino acid sequencing and amino acid analysis. Trypsin cleavage produced the ATCase domain with a 20-residue amino-terminal extension. Hydrodynamic studies showed that the isolated domain is a 110-kDa trimer with a Stokes radius of 41 A. The mammalian ATCase domain and the prokaryotic enzymes have virtually identical active-site residues and are likely to have the same tertiary fold.

Title

Mammalian aspartate transcarbamylase (ATCase): sequence of the ATCase domain and interdomain linker in the CAD multifunctional polypeptide and properties of the isolated domain.

Author

J P Simmer, R E Kelly, J L Scully, D R Grayson, A G Rinker, Jr, S T Bergh, and D R Evans

Publish date

1989 Jun;

PMID

8391637

Abstract

We have recently described three novel human small nucleolar RNA species with unique nucleotide sequences, which were named E1, E2, and E3. The present article describes specific psoralen photocross-linking in whole HeLa cells of E1, E2, and E3 RNAs to nucleolar pre-rRNA. These small RNAs were cross-linked to different sections of pre-rRNA. E1 RNA was cross-linked to two segments of nucleolar pre-rRNA; one was within residues 697 to 1163 of the 5′ external transcribed spacer, and the other one was between nucleotides 664 and 1021 of the 18S rRNA sequence. E2 RNA was cross-linked to a region within residues 3282 to 3667 of the 28S rRNA sequence. E3 RNA was cross-linked to a sequence between positions 1021 and 1639 of the 18S rRNA sequence. Primer extension analysis located psoralen adducts in E1, E2, and E3 RNAs that were enriched in high-molecular-weight fractions of nucleolar RNA. Some of these psoralen adducts might be cross-links of E1, E2, and E3 RNAs to large nucleolar RNA. Antisense oligodeoxynucleotide-targeted RNase H digestion of nucleolar extracts revealed accessible segments in these three small RNAs. The accessible regions were within nucleotide positions 106 to 130 of E1 RNA, positions 24 to 48 and 42 to 66 of E2 RNA, and positions 7 to 16 and about 116 to 122 of E3 RNA. Some of the molecules of these small nucleolar RNAs sedimented as if associated with larger structures when both nondenatured RNA and a nucleolar extract were analyzed.

Title

Three new small nucleolar RNAs that are psoralen cross-linked in vivo to unique regions of pre-rRNA.

Author

O J Rimoldi, B Raghu, M K Nag, and G L Eliceiri

Publish date

1993 Jul;

PMID

1318408

Abstract

The hepatitis B virus X gene encodes a transcription activator which stimulates the synthesis of RNAs from a variety of class II and III promoter elements. In this report, we present a mutational analysis which genetically demonstrates that the X gene actually encodes two, and possibly three, related polypeptides from a single mRNA using alternate translation initiation from any of three in-frame AUG codons. Genetic analysis shows that translation initiates at the 5′ proximal AUG of X mRNA and produces a full-length 17-kDa X protein but in addition also likely initiates at either of two conserved, in-frame AUG codons, producing two amino-terminally truncated X proteins presumably of 8 and 6.6 kDa. Expression of mRNAs capable of encoding only one of each X protein all individually transactivate class III (RNA polymerase III)-transcribed promoters. However, class II (RNA polymerase II)-transcribed promoters displayed various requirements for the different X proteins. Expression of two X proteins, the 17- and 6.6-kDa species, was required to activate transcription of the simian virus 40 enhancer/early promoter. In contrast, activation of an NF-kappa B-dependent promoter was carried out only by mRNAs encoding the full-length 17-kDa X protein. These results indicate that the X gene encodes several related proteins that possess different transcriptional regulatory activities.

Title

Alternate translation initiation on hepatitis B virus X mRNA produces multiple polypeptides that differentially transactivate class II and III promoters.

Author

L Kwee, R Lucito, B Aufiero, R J Schneider

Publish date

1992 Jul;


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