Table 2. Dihedral Angle Values Found for Each Residue of Tetramer 4.

residuea	ω	ϕ	ψ
A	–0.1	–74.5	165.9
B	–7.9	–85.9	165.5
C	–9.7	–70.8	166.6
D	–7.5	–77.8	170.4b

^aResidues depicted in Figure 3.

^bThe ψ angle referred to the ester bond NCCO(Me) of the last residue D.