SAS-B Sialic acid synthase B locus (SAS-B) SAS-B exons 1-6 in original location
ID: 3165733 • Letter: S
Question
SAS-B Sialic acid synthase B locus (SAS-B) SAS-B exons 1-6 in original location E1 E2 E3 E4 E5 E6 SAS-B is duplicated and translocated to a different chromosome E1 E2 E3 E4 E5 E6 - H H - J- -SAS-B duplicate in new location AFPIN results from a deletion mutation in SAS-B duplicate AFPN E1 E2 AFPIW is duplicated into a string of tandem repeats AFPWI AFP AFPIN AFP Tandem repeats Although the full series of events involving the evolution of antifreeze proteins in Antarctic icefish is quite complicated, the essence of the explanation is that A. the sialic acid synthase B locus produces a natural antifreeze protein. B. transposable elements moved the sialic acid synthase B locus around in the genome allowing the acquisition of new functions C. tandem duplication of gene copies is by itself adequate to make a new gene. D. gene duplication and divergence of copies can provide material for the evolution of new protein functions.Explanation / Answer
a) the sialic acid synthase B lociu produces a natural antifreeze proteins
The sialic acid synthase B produces enzymes which codes for the antifreeze proteins which flow in blood and bind to ice crystal preventing more water absorption by eh ice crystals and there by decreasing the size of ice crystals by thermoregulation which allow ant freezing proteins.
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