# How do you find the molecular weight of a protein from the sequence?

## How do you find the molecular weight of a protein from the sequence?

How to calculate protein molecular weight from the sequence? It’s just as simple as it seems – add together all the molecular weights of the amino acids present in your sequence. You also need to subtract the molecular weight of water for every bond created.

How do you convert DNA sequence to protein?

Basically, a gene is used to build a protein in a two-step process:

1. Step 1: transcription! Here, the DNA sequence of a gene is “rewritten” in the form of RNA.
2. Step 2: translation! In this stage, the mRNA is “decoded” to build a protein (or a chunk/subunit of a protein) that contains a specific series of amino acids.

How do you calculate protein weight?

To determine your protein needs in grams (g), first, calculate your weight in kilograms (kg) by dividing your weight in pounds by 2.2. Next, decide how many grams of protein per kilogram of body weight is appropriate for you. Use the low end of the range if you are in good health and are sedentary: 0.8g per kg.

### How do you find the molecular weight of a base pair of protein?

The molecular weight or molar mass of any double-stranded DNA fragment can therefore be calculated by multiplying its length (in bp) by 650 and the answer will be expressed as daltons or g/mol.

What is the molecular weight of a protein?

The molecular weights of a large number of proteins have been determined. Most consist of several subunits, the molecular weight of which is usually less than 100,000 and frequently ranges from 20,000 to 30,000.

How do you make a protein sequence?

Create a Protein Sequence

1. Open the New Protein Window.
2. Type or Paste a Protein Sequence. Type in the field provided to manually enter a sequence, paste a raw sequence (amino acids + stop codons only), or paste the text of a formatted sequence (Fasta, GenPept/UniProt or GCG format).
3. Save the New Sequence.

#### What is molecular weight of protein?

What is the molecular weight of DNA?

The average molecular mass of one base pair 660 g/mol is taken in the case of double-stranded DNA, if the DNA is single-stranded then the average molecular mass will be taken as 330 g/mol.

How do you read a protein sequence?

The sequence of a protein is usually notated as a string of letters, according to the order of the amino acids from the amino-terminal to the carboxyl-terminal of the protein. Either a single or three-letter code may be used to represent each amino acid in the sequence.

## How do you calculate molecular weight of DNA?

The average weight of a single DNA bp is 650 daltons. This can also be written as 650 g/mol (= molar mass).

• This is the same as saying that one mole of a bp weighs 650 g.
• The molecular weight or molar mass of any double-stranded DNA fragment can therefore be calculated by multiplying its length (in bp) by 650 and the answer will be expressed as
• How do you calculate the concentration of DNA?

“ DNA concentration is estimated by measuring the absorbance at 260nm, adjusting the A260 measurement for turbidity (measured by absorbance at 320nm), multiplying by the dilution factor, and using the relationship that an A260 of 1.0 = 50µg/ml pure dsDNA. Concentration (µg/ml) = (A260 reading – A320 reading) × dilution factor × 50µg/ml.

What is the concentration of DNA?

DNA yield (µg) = DNA concentration × total sample volume (ml) However, DNA is not the only molecule that can absorb UV light at 260nm. Since RNA also has a great absorbance at 260nm, and the aromatic amino acids present in protein absorb at 280nm, both contaminants, if present in the DNA solution, will contribute to the total measurement at 260nm.

The molecular weight of an E coli DNA molecule is about 3.1 X109 g/mol. The average moleculaer weight of a nucleotidepair is 660 g/mol and each nucleotide pair contributes 0.34 nm tothe length of DNA.