COL11A1 and chondrosarcoma: Members from this group show in a later study that NF-YA also regulates the promoter region of COL11A1 in rat chondrosarcoma (RCS) as well as mouse pre-chondrocyte ATDC5 cells [75], and also show in another study that transcription factor Sp1 also regulates COL11A1 expression in rodent RCS cells [76].