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The complete data for Tryptophan ... Molar mass: 204.23 g·mol −1 Systematic name: (S)-2-Amino-3-(1H-indol-3-yl)-propanoic acid Abbreviations: W, Trp Synonyms:
In biochemistry, the molar absorption coefficient of a protein at 280 nm depends almost exclusively on the number of aromatic residues, particularly tryptophan, and can be predicted from the sequence of amino acids. [6] Similarly, the molar absorption coefficient of nucleic acids at 260 nm can be predicted given the nucleotide sequence.
[1] [2] Most proteins absorb at 280 nm due to the presence of tyrosine and tryptophan. Of the aromatic amino acids, tryptophan has the highest extinction coefficient; its absorption maximum occurs at 280 nm. The absorption maximum of tyrosine occurs at 274 nm. [3]
Bovine serum albumin (BSA or "Fraction V") is a serum albumin protein derived from cows. It is often used as a protein concentration standard in lab experiments. The nickname "Fraction V" refers to albumin being the fifth fraction of the original Edwin Cohn purification methodology that made use of differential solubility characteristics of plasma proteins.
Tryptophan (symbol Trp or W) [3] is an α-amino acid that is used in the biosynthesis of proteins.Tryptophan contains an α-amino group, an α-carboxylic acid group, and a side chain indole, making it a polar molecule with a non-polar aromatic beta carbon substituent.
Extinction coefficient refers to several different measures of the absorption of light in a medium: Attenuation coefficient , sometimes called "extinction coefficient" in meteorology or climatology Mass extinction coefficient , how strongly a substance absorbs light at a given wavelength, per mass density
The molar extinction coefficient of Hb has its highest absorption peak at 420 nm and a second peak at 580 nm. Its spectrum then gradually decreases as light wavelength increases. On the other hand, H b O 2 {\displaystyle HbO2} shows its highest absorption peak at 410 nm, and two secondary peaks at 550 nm and 600 nm.
11657 Ensembl ENSG00000163631 ENSMUSG00000029368 UniProt P02768 P07724 RefSeq (mRNA) NM_000477 NM_009654 RefSeq (protein) NP_000468 NP_033784 Location (UCSC) Chr 4: 73.4 – 73.42 Mb Chr 5: 90.61 – 90.62 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Human serum albumin is the serum albumin found in human blood. It is the most abundant protein in human blood plasma ; it ...