it has previously been shown that : ( i ) during infection of its host , the dna bacteriophage t7 assembles a dna-free procapsid ( capsid i ) , a capsid with an envelope differing physically and chemically from the capsid of the mature bacteriophage , and ( ii ) capsid i converts to a capsid ( capsid ii ) with a bacteriophage-like envelope as it packages dna .
C0000702
a dna
C0012854
dna