Nature CommunicationsCAPTAIN: a multimodal foundation model pretrained on co-assayed single-cell RNA and proteinBoya JiTingting HuJiawen WangMengmeng LiuLiwen XuQinhao ZhangSiyun ZhongLibo QiaoYan ZhangShaoliang PengFulong Yu2026-05-07Full textDOI https://doi.org/10.1038/s41467-026-72882-y