Worked example 3 — complementary strand

Given: one strand reads 5′‑A‑A‑T‑C‑C‑3′. Find the partner. Pair each base: A–T, A–T, T–A, C–G, C–G → 3′‑T‑T‑A‑G‑G‑5′. Note that the partner is written in the opposite direction; read in the 5′→3′ direction it is 5′‑GGATT‑3′.