3-hydroxyaspartic acid 3-hydroxyaspartic acid 3-hydroxyaspartic acid (three letter abbreviation: hya) also known as beta-hydroxyaspartic acid is derivative of aspartic acid which has been hydroxylated at position-3. the adjacent image shows l-threo-3-hydroxyaspartate. the hya amino acid residue is sometimes contained in egf-like domains such as vitamin k-dependent coagulation plasma proteins including protein c. 3-hydroxyaspartic acid names preferred iupac name (2s)-2-amino-3-hydroxybutanedioic acid other names (2s)-2-amino-3-hydroxysuccinic acid3-hydroxyaspartic acidbeta-hydroxyaspartic acid identifiers cas number 1860-87-3 y 3d model (jsmol) interactive imageinteractive image chebi chebi:10696 y chemspider 391503 y iuphar/bps 4497 kegg c11511 y pubchem cid 443239 unii 99a78v5yx2 y inchi inchi=1s/c4h7no5/c5-1(3(7)8)2(6)4(9)10/h1-2,6h,5h2,(h,7,8)(h,9,10)/t1-,2-/m0/s1 ykey: yylquhnpncgkjq-lwmbppnesa-n yinchi=1/c4h7no5/c5-1(3(7)8)2(6)4(9)10/h1-2,6h,5h2,(h,7,8)(h,9,10)/t1-,2-/m0/s1key: yylquhnpncgkjq-lwmbppnebt smiles c(c(c(=o)o)o)(c(=o)o)no=c(o)(n)(o)c(=o)o properties chemical formula c4h7no5 molar mass 149.102 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). n verify (what is yn ?) infobox references