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These are completely different proteins from LRRC23 (Leucine Rich Repeat Containing 23), which is a ciliary/axonemal protein involved in sperm flagella and cilia function.\n\nThe \"B7\" alias for LRRC23 in HGNC appears to be a legacy/retired symbol that collides with the well-known B7 immune costimulatory molecules (CD80, CD86, and their family members). The corpus has been retrieved based on this collision — none of these 100 papers describe the LRRC23 protein (a leucine-rich repeat protein involved in ciliary function/sperm motility).\n\nSince none of the abstracts in this corpus describe the canonical LRRC23 protein, there are no mechanistic discoveries to extract.\n\n```json\n{\n  \"discoveries\": [],\n  \"current_model\": \"No mechanistic findings about LRRC23 (Leucine Rich Repeat Containing 23) are present in the available literature; the entire retrieved corpus describes the immunological B7 family (CD80/CD86/PD-L1/B7-H3/B7-H4, etc.), which represents a symbol collision with the legacy alias 'B7' formerly associated with LRRC23.\"\n}\n```","stage2_raw":"","audit_flag":null,"evaluation":null}