Members in this family of proteins are annotated as Cysteine and tyrosine-rich protein 1, however currently no function is known [1].

1: Cysteine and tyrosine-rich 1 (CYYR1), a novel unpredicted gene on human chromosome 21 (21q21.2), encodes a cysteine and tyrosine-rich protein and defines a new family of highly conserved vertebrate-specific genes. Vitale L, Casadei R, Canaider S, Lenzi L, Strippoli P, D'Addabbo P, Giannone S, Carinci P, Zannotti M; Gene. 2002;290:141-151. PMID:12062809