An investigator purified a protein (protein x) from e. coli.
sheinjected protein x into rabbit...
Biology, 13.09.2019 19:10, melvindiana58
An investigator purified a protein (protein x) from e. coli.
sheinjected protein x into rabbits to generate antibodies
thatrecognize and bind to protein x. using an
electrophoretictechnique, she separated the proteins from a crude
cell extract andused the antibody to locate protein x on the gel.
to her surprise, the antibody bound not only with protein x but also
with a secondunrelated protein (protein y). when proteins x and y
weresequenced, she found that the sequence of residues 67-78,
inprotein x and that of residues 120-131 in protein y were
identical. the investigator rationalize the data, recognizing
thatantigenic determinants (epitopes) of proteins are clusters of
aminoacids.
Answers: 2
Biology, 21.06.2019 20:40, jaycie16
Match the following terms describing electrical events with the correct phases of the cardiac cycle. the ventricular muscle cells depolarize at the start of this phase. during this phase, na+ entry through the funny channels causes the pacemaker potential of sa nodal cells to gradually become less negative until it reaches threshold. the ventricular muscle cells repolarize right before this phase. the cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. a. isovolumetric relaxation b. ventricular ejection c. isovolumetric contraction d. ventricular filling
Answers: 3
Biology, 22.06.2019 01:40, warnene17
Elephants in the savanna regions of africa dig holes in dried up river beds to reach water lying just below the surface. these holes provide drinking water for other animals as well. so, without the elephants, many animals might otherwise die from lack of water during the dry season. the location in which the elephants live is an example of a/n and the role they play in creating water holes is an example of a a) ecosystem; habitat b) community; niche c) habitat; niche d) niche; habitat
Answers: 1
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