This is the C-terminal domain of Chordin-like proteins 1 and 2. These proteins can bind BMPs family ligands and inhibit its activity by blocking their interaction with their receptors. They are involved in myoblast and osteoblast differentiation and maturation [1,2].

1: hCHL2, a novel chordin-related gene, displays differential expression and complex alternative splicing in human tissues and during myoblast and osteoblast maturation. Oren A, Toporik A, Biton S, Almogy N, Eshel D, Bernstein J, Savitsky K, Rotman G; Gene. 2004;331:17-31. PMID:15094188

2: Chordin-Like 1 Improves Osteogenesis of Bone Marrow Mesenchymal Stem Cells Through Enhancing BMP4-SMAD Pathway. Liu T, Li B, Zheng XF, Jiang SD, Zhou ZZ, Xu WN, Zheng HL, Wang CD, Zhang XL, Jiang LS; Front Endocrinol (Lausanne). 2019;10:360. PMID:31249554