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7. Below is the structure of lysine in its hypothetical neutral form. Choose the structure of...
7. Below is the structure of lysine in its hypothetical neutral form. Choose the structure of lysine as it would exist in aq. solution at neutral pH. H2N-CH-C-OH CH2 CH2 CH2 1 CH2 1 NH2 lysine O HNCH CH-Z8 OH =ç«-&_• HN-CH- CH2 HUN-CH 1 CH2 CH2 HEN-CH CH2 CH2 CH2 CH2 1 NH2 HENCH CH2 CH 1 CH2 CH H2N-CH CH2 CH2 CH2 CH2 NH, CH2 CH2 CH2 CH2 NH3 CH2 @NH @NH A B С D E
The correct structure for Lysine at pH 2.5 is: O H2N-CH-C 0 *HAN-CH=C- o H2N-CH-C-OH "HN-CH-C-OH CH2 CH2 CH2 CH2 CH CH CH2 CHE ÇH₂ NH2 NH, NH NH" b
Knowing the information found in the table below, what is the predominant form of lysine at pH 9.5? pka of α-NH3+ pKa of side chain Amino Acid pK, of α-COOH Lysine 2.18 8.95 10.53 H3N H2N NH2 NH H2N H3N OH OH NH2 NH2
Choose the amino acids from the list below that could combine to give the following dipeptide. H2-CH- CH-C -OH H CH2 H N—C—C—OH CH2 H N—C—C- -OH CH2 CH2 CH2 CH2 NH2 H2N-CH-C-OH CH2 OH H2N-CH- -C- -OH Н. OO H2N-CH-C-OH CH-CH, сн.
QUESTION 14 Which of the following mechanisms for the formation of the most stable imine is correct? HÆNER HNER А R H-0. R-NH --- PhCH Ph Ph Patch Ph CH, "CH PH CH, NH NH RH R HN-R HN-R HNER HANZA B -CH R-NH2 Ph Ph PH PACH Ph Ph Ph CH CH MY RH HN-R HN-R HNR HON-R c OH HO R-NH2 Ph Ph Ph CH Pt-CH Ph CH, Ph CH NH R R HN-R HN-R MNR HNER D...
Which of the pH conditions shown below would give this heptapeptide an overall charge of +2? COOH CH2 CH NH NH. CH5 HN CH NH,— сH,CH,CH,CH NH NH2 NH C но CH CH2 CH C СООН (a) The cyclic structure means that the system will always be isoelectronic (b) рH %3 3 (c) Neutral pH (d) pH 10 (e) The system will always be charged as it is a zwitterion = 40 Which of the pH conditions shown below would...
QUESTION 14 Which of the following mechanisms for the formation of the most stable imine is correct? H2NER H2NER A 16 іон, HUR R-NH2 CN Ph H-O: -CH3 Ph NH R Ph CH3 CH3 : ОН -CH3 Ph UNH R H H2N-R Ph -CH3 CNH Ph CH3 Ph CH3 H2N-R HN=R H₂NER B +H R-NH2 N : OH -CHE Ph Hö -CH3 Ph1 NH R OH CH3 Ph NH Ph CH3 Ph CH3 Ph CH3 Ph CH3 H H2N-R H2N-R...
19) The form of dipeptide aspatylserine (Asp-Ser) obtained from two amino acids, aspartic acid and serine, whose structures are shown here, is HiN-CH-C-0HIN-CH-C-0 CH2 CH OH aspartic acid serine A HN-CH-C-o-N-CH-C-o CH OH CH2 coo -(H-C-o-H-c-o CH OH CH2 HIN CH-C-N-CH-C-O CH OH CH H-CH-CH CH CH OH coo- 20) Where is the peptide bond located in this dipeptide? serine valine a) the CO-NH joining serine and the valine b) the doubly bonded oxygen just left of center between the...
Which of the following amino acids has a side chain with an ionizable proton and can exist in four different forms, depending on the pH of the solution? H I. Proine CO IV. Alanine CH-d-cool Η'ΦΗ NH3 N H H II. Serie HO-CH2-c-coo NH V. Glycine H-d-cooo NH HN H IIL Histidine -CH2-Ć-COOB H NH 11 С СО СО IV v Submit Request Answer
Which of the following mechanisms for the formation of the most stable imine is correct? Which of the following mechanisms for the formation of the most stable imine is correct? HNER HIN=R А OH йон, -cн, Ph (NH R-NH2 Ph Ph CH3 OH -CH3 Ph N-H- RH Ph CH3 Ph TCH NH R CH3 Ph CH3 R H2N-R H2N-R H2NER H2NER B o H- он, R-NH2 -CH3 Ph CH3 Ph CH3 * он -CH3 Ph NH RM H2N-R X CH₃...