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In some embodiments, the molecular weight increment is, when rounded to the nearest 1 kDa, a multiple of 5 kDa, a multiple of 10 kDa, a multiple of 20 kDa, or a multiple of 50 kDa. Blue Protein Standard, Broad Range, New England Biolabs. Novex sharp prestained protein standard.html. 5 ml of Column Conditioning solution (8M urea, 20 mM phosphate, 0. Protein Alkylation of Unstained Markers. In some embodiments, a pre-labeled protein standard set includes at least ten labeled proteins spanning a molecular weight range of from 10 kDa or less to 250 kDa or greater, in which the electrophoretic migration of 70% of the labeled protein standards having a molecular weight of 10 kDa or greater is within 2% of the electrophoretic migration of each of the protein standards in unlabeled form. A vector, protein-encoding sequences, etc. Expression constructs encoding 100, 150, and 250 kd proteins containing multimers of the BH6mer ORF, which contained 4 cys and 0 lys residues per 10 kd were made using insert fragments of the pTrc BH 60 kDa expression construct of Example 1 generated by PCR.

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15B shows a 4-12% Bis-Tris gel with 1×MOPS running buffer, and FIG. Up to 100% electroblot transfer efficiency (Seema Qamar, CIMR, Cambridge University 2018). Using the pTrc BH 60 kDa expression construct of Example 1 as the PCR template, several 50 kDa inserts were generated using Platinum® PCR Supermix High Fidelity PCR mix (Invitrogen; Carlsbad, Calif. ) that contained Taq DNA polymerase, Pyrococcus species GB-D thermostable polymerase, Platinum® anti-Taq polymerase antibody, 66 mM Tris-504 (pH 8. 100 μl of 10 mg/ml Insulin-b chain is brought up to a volume of 1 ml in a solution having a final concentration of 50 mM Tris pH=8, 0. Novex™ Sharp Pre-stained Protein Standard. Please try the standard protocols listed below and let us know how you get on. In some preferred embodiments, an amino acid sequence derived from a thioredoxin sequence differs from the naturally-occurring thioredoxin sequence by lacking lysine residues.

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"Do not differ substantially" or "substantially the same" means that the referenced compositions or components differ by less than 10% of the larger of the compared values. Novex sharp prestained protein standard edition. The width of each peak at half height was therefore divided by 11. The reaction preferably proceeds spontaneously without added reagents at a suitable temperature. "Recombinant methods" is used interchangeably with "genetic engineering" and "recombinant [DNA] technology". The pTrc1-2 C6 vector, containing two 50 kd inserts, was digested with Avr II and PmeI.

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As used herein, the term "protein" encompasses peptides. The sequence of the insert was not directly determined. The standard consists of 12 colored bands in the range of 3. For example, the method in some embodiments includes attaching a label that includes an amino-reactive group, such as but not limited to an isothiocyanate, an isocyanate, an acyl azide, an N-hydroxysuccinimide (NHS) ester, a haloacetyl compound, a maleimide derivative, a sulfonyl chloride, an aldehyde, a ketone, a glyoxal, an epoxide, an oxirane, a carbonate, an aryl halide, an imidoester, a carbodiimide, or an acid anhydride, to a protein that is depleted in cysteine residues. A recombinant protein can be made in cells harboring a recombinant nucleic acid construct, which can be cells of an organism or cultured prokaryotic or eukaryotic cells, or can made in vitro using, for example, in vitro transcription and/or translation systems. Pre-stained molecular weight standards have a differing mobility and as a consequence varying apparent molecular weight when run in distinct SDS-PAGE buffer systems. The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user. Novex sharp prestained protein standard dual. One or more proteins of a set of labeled protein standards can be selectively labeled, for example, on the sulfhydryl group of cysteine, on the primary amine of an N-terminal amino acid and/or the primary amine of lysine, on the secondary amine of the imidazoyl group of histidine or the indole ring of tryptophan, on the carboxyl groups of the C-terminal amino acid or of aspartate or glutamate, on the thioether of methionine, on the phenolate of tyrosine, or on the amidino group of asparagine. 16 mm, a difference of just under 2-fold. Calculation of Band Widths of Electophoresed Proteins of a Pre-Labeled Protein Standard Set. Sharp Molecular Weight Marker Expression Plasmids: 110, 160, and 260 kd Proteins. An unlabeled standard set comprising the same proteins as the pre-labeled set was also formulated. 1 D3 vector was digested with XhoI and Not I and the gel purified vector was ligated with the 50. The purification should be performed the same day the lysate is prepared.

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Add 40 ml 1M sodium phosphate pH=7. Labeled proteins of a pre-labeled protein standard set on the invention that are not selectively labeled can be recombinant proteins or proteins isolated from cells, tissues, organisms, biological samples, or media. 6, 703, 484) was labeled for use as the 10 kDa standard of the pre-labeled marker set. Synthesis of 50 kd PCR Inserts (1314 bp). The sample concentration is determined visually or using the Alpha Imager 3000 with quantitation software (Alpha Innotech, San Leandro, Calif., USA). In some preferred embodiments, the selectively labeled proteins having a molecular weight of greater than 10 kDa or greater do not differ by more than 5% in their migration in denaturing acrylamide electrophoresis gels from the migration of the same proteins in unlabeled form. In some embodiments, a protein of a pre-labeled protein standard set that is selectively labeled on cysteine comprises an amino acid sequence derived from an nucleotide-disulfide oxidoreductase, such as a lipoamide dehydrogenase, a glutathione reductase, or a thioredoxin.

The pre-labeled protein molecular weight standard sets can comprise two, three, four, five, six, seven, eight, nine, ten, eleven, twelve, thirteen, fourteen, fifteen, or more labeled proteins. 50 ml cell culture is centrifuged at 5000×g for 10 minutes. Rich media per liter: 12 grams of tryptone, 24 grams of yeast extract dissolved in distilled water to a final volume of 1 liter is autoclaved, and after cooling to approximately 30 degrees C., 10 mls of 10 mg/ml ampicillin, 50 mls of 20×NPS, 10 mls of 5052 solution, and 1 ml of 1 molar Magnesium Sulfate are added.

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