Biology, 19.10.2019 03:20 KieraKimball
Botulinum toxin is produced by clostridium botulinum, a gram-negative bacterium. the toxin actually consists of 7 related toxins, types a, b, c1, d, e, f and g. the toxin is synthesized as a protoxin of 150 kda, which is proteolytically cleaved to a light (l) and heavy (h) chains that remain linked by a disulfide bond. nerve terminals have receptors for both l and h chains. the l-chain is transported across the nerve terminal membrane by endocytosis. these l chains are metaloproteinases -proteases that require metal ions for activity. the l-chain binds zn2+, and it proteolytically degrades several proteins that make up the snare complex. a) what do you suppose happens when botulinum toxin is injected near the neuromuscular junctions? b) from this conclusion, what do you suppose the basis for botox injections?
Answers: 1
Biology, 21.06.2019 15:00, paolaz80045
Which class of molecules contains the amino group, nh2 (a) sugars (b) water (c) proteins (d) hydrocarbons
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Biology, 21.06.2019 15:30, lilpeepxliltracy
*will mark brainliest to first correct answer* photosynthesis led to increasing levels during the later proterozoic eon? a. oxygen b. water c. carbon dioxide d. none of the above
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Biology, 22.06.2019 08:20, mommabear4887
Wich level of organization includes all the other levels or organizations
Answers: 1
Botulinum toxin is produced by clostridium botulinum, a gram-negative bacterium. the toxin actually...
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