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The extent of branching (number of α1→6 glycosidic bonds) in amylopectin can be determined by extensive methylation followed by identification of the hydrolysis products of the methylated polysaccharide, as follows: A sample of amylopectin is exhaustively treated with a methylating agent (methyl iodide) that replaces all the hydrogens of the sugar hydroxyls with methyl groups, converting –OH to –OCH3, an ether functional group. All the glycosidic bonds in the methylated sample are then hydrolyzed in aqueous acid, and the various methylated derivatives are quantitated. What derivatives you would expect of the monosaccharides that wereA. from the non-reducing termini of the amylopectin molecules?
B. from the reducing termini of the amylopectin molecules?
Discuss embryonic stem cell invitro methord in which transgenic animal were generated and efficient show how homologous recombination happening?
q1. richard neis had symptoms of excessive secretion of pth high blood calcium levels and his physicians were certain
Cord blood stem cells are stem cells with hematopoietic potential. In class, we have learned about drawbacks and benefits of CBSCs over HSCs.
Restriction endonucleases are especially useful if they generate "sticky" ends. What makes an end "sticky" and why is this especially useful for inserting DNA fragments into plasmid DNA?
When a particular gene is said to be ‘sex-linked', on which chromosome is that gene usually present?
though , certain pairs of his progeny, when interbred, produced red and white progeny at a frequency of about 25 percent. Nick was soon removed from the stud lists of the Holstein breeders. Explain why, using symbols.
How much ATP can be produced from one molecule of butterfat containing one molecule of glycerol and the following fatty acids: first fatty acid: 12 carbons, second fatty acid 6 carbons
Explain why a deficiency either of vitamin B12 or of folate causes red blood cells to be larger than normal.
What causes rejection by the body's immune system after a transplant of an improperly matched organ?
A given protein contains five glutamic acid residues, eight aspartic acid residues, four lysine residues, two histidine residues and three arginine residues. What would be the net charge on this protein at pH 7?
On the Pacific island of Guam, large herbivorous bats called "flying foxes" commonly feed on cycad seeds, a potent source of neurotoxins. The flying foxes do not visit male cones. As a result, what should be true.
State a prediction that could be tested via additional observation and state a prediction that could be tested via experiment
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