primary structure

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Related to Primary structure of proteins: Secondary structure of proteins, Tertiary structure of proteins

primary structure

[′prī‚mer·ē ′strək·chər]
(aerospace engineering)
The main framework, of an aircraft including fittings and attachments; any structural member whose failure would seriously impair the safety of the missile is a part of the primary structure.
(biochemistry)
The sequence of amino acids in the molecule of a protein or a peptide.
(geology)
A structure, in an igneous rock, that formed at the same time as the rock, but before its final consolidation.
(organic chemistry)
The chemical structure of a polymer chain.

primary structure

Those structures of the airplane whose failure would seriously endanger the safety of the airplane. It includes the fuselage, wings, control surfaces, and engine mounts.