the cleavage reactions of the head proteins p22 , p23 , p24 , and ipiii are prevented by l-canavanine as shown by the accumulation of the precursor proteins and the failure of the cleaved products to appear . l-canavanine also prevents the appearance of p12 ( tailplate protein ) and p20 ( head protein ) indicating that these proteins may undergo a proteolytic cleavage during normal assembly .
C0033665
precursor proteins
C0033684
proteins