We found one dictionary that defines the word heptapeptides:

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1. heptapeptides: Wiktionary

Opposite: nonapeptides, octapeptides, hexapeptides ▸ Words similar to heptapeptides ▸ Usage examples for heptapeptides ▸ Idioms related to heptapeptides ▸ Wikipedia articles (New!) ▸ Words that often appear near heptapeptides ▸ Rhymes of heptapeptides ▸ Invented words related to heptapeptides