A protein has a number of aspartyl and gluatmyl residues, what would be the expected pl for this protein? 4 a O b. OC. Od Neutral pl Acidic pl Cannot be determined. Basic pl
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- Consider the hydrogen bonding pattern of an α-helix with the following sequence: HLRTNAGCSY Asparagine’s amide hydrogen is hydrogen bonded to: a. Serine’s side chain b. Histidine’s backbone carbonyl oxygen c. Cysteine’s backbone carbonyl oxygen d. Serine’s backbone carbonyl oxygen e. Histidine’s side chainGiven the structures of the ribonucleotides and deoxyribonucleotides: Adenine Uracil Thymine HN Adenine NH HO-P-0- CH2 HO-P-0 CH2 HO-P-0-CH2 HO-P-0-CH он он он он OH H OH H Cytosine Cytosine Guanine Guanine NH2 NH NH2 CH2 HOo CH2 HO-P-0 -CH2 он он он он OH H OH H • Draw the structure of the polyribonucleotide UAGCCUG. Draw the structure of the polydeoxyribonucleotide CGTAGAT.Given below is a sequence of a polypeptide: AVLLRKIFWFDLAG The pKas of different groups/side chains are shown in the table below: Group/side chain pka C-terminus 3.5 Asp 3.9 Glu 4.1 His 6.0 Cys 8.4 Tyr 10.5 Lys 10.5 Arg 12.5 N-terminus 9.0 What is the total charge of this molecule at pH 11? [ Select ] What is the total charge of this molecule at pH 13? [ Select ] What is the isolectric point for this molecule? (Select]
- Consider a protein with that has a segment with the following sequence: His-Cys-Leu-lle-Met where Met is at the C-terminus end. Based on the information given, this protein segment may form: an N-glycosidic bond to the His residue. an ester linkage to the C-terminus end. O an amide bond to a ganglioside. a thioether linkage to the cystine residue.Given below is a sequence of a polypeptide: AVLLRKIFWEDLAG The pKas of different groups/side chains are shown in the table below: Group/side chain pka C-terminus 3.5 Asp 3.9 Glu 4.1 His 6.0 Cys 8.4 Tyr 10.5 Lys 10.5 Arg 12.5 N-terminus 9.0 What is the total charge of this molecule below pH 3.5? [ Select ] What is the total charge of this molecule at pH 5? [Select ]For each polypeptide derived in the following sequences: 5' CAA GAG GUA UCC UAC AGA 3' 5' GUC AUC UGG AGG GGC AUU 3' 5' CUA UGC AGU AGG ACA CCC 3' 1. Draw the structure of each polypeptide. 2. Label the amide bonds. 3. Identify the N-terminal and C-terminal amino acids. 4. Write the name of each polypeptide.
- Draw the RNA dinucleotide formed if deoxyguanidine 5'phosphate and deoxythymidine 5'phosphate monophosphates undergo a condensation reaction. Label the 5' and 3' ends of your structure. 0-P-O-CH2 NH2 --P-O-CH2 Identify the phosphodiester bond. \H KH H. H H H H ОН H ОН H GPlease draw a single polypeptide chain structure that has the following amino acids (leucine, alanine, cystine, argenine, glutomine, and leucine) as it would appear at physiological pH. Calculate the pl of the polypeptide. I will rate!Draw the Ala-Ser-Leu-Asp polypeptide (perspective formula) showing the fully extended backbone geometry (all angles +/- 180°). Include correct stereochemistry for L-amino acids. Label all bond rotations representing the angles at each residue
- Changing one amino acid within a protein sequence from a tryptophan to a stop codon would be best classified as Amino acids groups Group Characteristics Names Ala, Val, Leu, Ile, Pro, Phe Trp, Met Ala: A Leu: L non-polar hydrophobic Arg: R Asn: N Lys: K Met: M Asp: D Cys: C Gly: G polar hydrophilic (non-charged) Gly , Ser, Thr, Cys, Tyr, Asn Gln Phe: F Pro: P Ser: S acidic negatively charged Asp, Glu Glu: E Gln: Q Thr: T His: H lle: I Trp: W Туr: Y Val: V basic positively charged Lys, Arg, His A) Conservative missense O B) Nonsense O C) Neutral O D) Non-conservative missenseIdentify and encircle the peptide bonds in this polypeptide (Asp-Sec-Leu-Cys-Glu).Consider the peptide Trp-Arg-Glu-Cys-Gly-Tyr. For the drawings requested below, please show them in zig-zag style, from amino to carboxy terminus, with correct stereochemistry Draw the predominant form at pH = 2 Draw the predominant form at pH = 5 Draw the predominant form at pH = 7 Draw the predominant form at pH = 12