>tr|Q38418|Q38418_BPT4 Head assembly core protein (Fragment) OS=Enterobacteria phage T4 OX=10665 GN=gp21 PE=4 SV=1 ARVIEGDHGPGDKLAANIRAGWIPGVSSRGLGSLTDTNEGYRIVNEGFKLTVGVDAVWGP SAPDAWVTPKEITESQTAEADTSADDAYMALAEAMKKAL