Loop and strand deletion maps. A. Summary of individual loop deletions (filled residues) providing four C. trachomatis MOMP proteins deficient in VS domains 1, 2, 3 or 4 (designated ΔVS1-4, respectively). B. Deletion of predicted β-strand 5 and its associated internal loop, designated in the text as Δβ5. C Deletion of predicted β-strands 5 and 6 and their associated internal and external loops, designated in the text as Δβ5,6.