This domain is also known as the 8 cysteine domain. This family includes the hybrid domains [1]. This cysteine rich repeat is found in TGF binding protein and fibrillin.

1: Genomic organization of the sequence coding for fibrillin, the defective gene product in Marfan syndrome. Pereira L, D'Alessio M, Ramirez F, Lynch JR, Sykes B, Pangilinan T, Bonadio J; Hum Mol Genet 1993;2:961-968. PMID:8364578

2: Solution structure of the transforming growth factor beta-binding protein-like module, a domain associated with matrix fibrils. Yuan X, Downing AK, Knott V, Handford PA EMBO J 1997;16:6659-6666. PMID:9362480