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Virus Module Set 6

T4 DNA contains hydroxymethyl-cytosine (HMC) instread of cytosine
T4 DNA is synthesized by two phage-encoded enzymes
T4 DNA is then HMC glucosylated
HMC glucosylation protects phage DNA from host restriction endonucleases
restriction endonucleases enzymes that cleave DNA at specific sequences
use of restriction endonucleases as a defense mechanism against viral infection
scaffolding proteins aid in construction of procapsid
lysis of host brought about by several T4 proteins
endolysin attacks peptidoglycan
holin produces lesion in cell membrane
lysogeny: nonlytic relationship between a phage and its host
lysogeny usually involves integration of phage genome into host DNA
prophage integrated phage genome
lysogens infected bacteria
temperate phages phages able to establish lysogeny
lysogenic conversion change in host phenotype induced by lysogeny
virion release of naked viruses usually by lysis of host cell
virion release of envelope viruses formation of envelope and release usually occur concurrently
Created by: Whereis_raye
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