MKHTELRAAVLDALEKHDTGATFFDGRPAVFDEADFPAVAVYLTGAEYTGEELDSDTWQAELHIEVFLPAQVPDSELDAWMESRIYPVMSDIPALSDLITSMVASGYDYRRDDDAGLWSSADLTYVITYEM U VMTU_LAMBD Minor tail protein U Gene U protein is a minor tail component, located at the proximal end; in conjunction with protein Z, it is involved in the termination of tail-tube polymerization. 131