Structure and Properties of Peptides The Ramachandran Plot illustrates the fact that the F & Y angles can assume any value in a peptide the F & Y angles can assume only a single value in a protein the F & Y angles can assume approximately three different values the peptide bond is planar the F & Y angles can assume any value in a peptide the F & Y angles can assume only a single value in a protein the F & Y angles can assume approximately three different values the peptide bond is planar ANSWER DOWNLOAD EXAMIANS APP
Structure and Properties of Peptides What is the effect of a decrease in pH on hemoglobin oxygen affinity? Decrease in oxygen affinity Increase in oxygen affinity Increase affinity in muscle cell otherwise decrease No effect on oxygen affinity Decrease in oxygen affinity Increase in oxygen affinity Increase affinity in muscle cell otherwise decrease No effect on oxygen affinity ANSWER DOWNLOAD EXAMIANS APP
Structure and Properties of Peptides Hydrogen bonds in a-helices are more numerous than Vander Waals interactions not present at Phe residues roughly parallel to the helix axis analogous to the steps in a spiral staircase more numerous than Vander Waals interactions not present at Phe residues roughly parallel to the helix axis analogous to the steps in a spiral staircase ANSWER DOWNLOAD EXAMIANS APP
Structure and Properties of Peptides The heme is held in place by a bond between the Fe2+ and cysteine the Fe3+ and cysteine the Fe2+ and histidine the Fe3+ and histidine the Fe2+ and cysteine the Fe3+ and cysteine the Fe2+ and histidine the Fe3+ and histidine ANSWER DOWNLOAD EXAMIANS APP
Structure and Properties of Peptides In deoxy hemoglobin (Hb), the Fe (II) is coordinated to four nitrogens of heme and to a water molecule two nitrogens of heme and to three His residues in Hb four nitrogens of heme, the proximal His, and a water molecule two nitrogens of heme and to three water molecules four nitrogens of heme and to a water molecule two nitrogens of heme and to three His residues in Hb four nitrogens of heme, the proximal His, and a water molecule two nitrogens of heme and to three water molecules ANSWER DOWNLOAD EXAMIANS APP
Structure and Properties of Peptides The oxygen binding curves of hemoglobin and myoglobin are identical both (a) and (b) allow maximum transfer of oxygen to the tissues are a consequence of the quaternary structure of hemoglobin are identical both (a) and (b) allow maximum transfer of oxygen to the tissues are a consequence of the quaternary structure of hemoglobin ANSWER DOWNLOAD EXAMIANS APP
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