Sentence examples for no double conformations from inspiring English sources

There are no double conformations in chain D. Referring to Fig. 11: 11

Of these only two amino acids in Insugen (I) ArgB22 and ValD12, have double conformations.

S S bridges with ordered double conformations have been previously reported.

Chains B and D both show a number of double conformations.

Comparison of the B-chains of Insugen (I) and Intergen (II): differences here occur for residues L11, V12 and R22 which have double conformations in Insugen (I) and T27 which has a double conformation in Intergen (II).

Why is chain A so well ordered while chain C shows a number of double conformations and poorly defined residues?

Double conformations L11, E13 and R22 occur only in chain B; the double conformation V18 occurs only in chain D; double conformations V12 and T27 occur in both chains B and D. L17, R22, F25 and T30 are disordered in chain B alone; F1, V2 and Q4 are disordered in chain D alone; E21, T27 and K29 are disordered in both chain B and D.  .

Why is chain A so well ordered while the related chain C shows a number of double conformations and poorly defined residues?

Both Insugen (I) and Intergen (II) structures exhibit structural features that can be described as: (a) highly ordered; (b) clear and resolved double conformations; (c) badly disordered.

In contrast the electron density of Insugen (I) chain D can be described as follows: residues F1, V2, Q4, E21 and K29 have overall poorly defined electron density; residues V12 and V18 have clear double conformations (orange); residue T27 is mainly a clear double conformation but with some missing terminal density.

The question of double conformations and poorly defined or absent electron density in the recombinant human insulin structures and the widespread lack of correspondence between the two raises two questions: (1) what is the origin of these differences?