LTBP2 and primary congenital glaucoma: LTBP2, a member of this superfamily, is located on chromosome 14 and codes a matrix protein of 1,821 amino acids. LTBP2 expression has been shown in human eyes, including the trabecular meshwork and ciliary processes reported to be relevant to the pathophysiology of primary congenital glaucoma and thus found to be associated with glaucoma [17].