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  Indian J Med Microbiol
 

Figure 1: Structure and functional domains of collagen α3 (IV) chain. Collagen α3 (IV) chains are one of the major constituent components of the basement membrane which is located at the base of the seminiferous epithelium in the mammalian testis. Each collagen monomer of collagen α (IV) is comprised of three collagen chains which are associated with one another as a triple helical structure (left panel). The resulting monomer contains a short N-terminal 7S domain of approximately 15 amino acid residues, with a signal peptide of 28 amino acids at the N-terminus, followed by a long collagenous domain of approximately 1400 residues of Gly-Xaa-Yaa repeats and a C-terminal noncollagenous domain (NC1) of approximately 230 residues (right panel).

Figure 1: Structure and functional domains of collagen α3 (IV) chain. Collagen α3 (IV) chains are one of the major constituent components of the basement membrane which is located at the base of the seminiferous epithelium in the mammalian testis. Each collagen monomer of collagen α (IV) is comprised of three collagen chains which are associated with one another as a triple helical structure (left panel). The resulting monomer contains a short N-terminal 7S domain of approximately 15 amino acid residues, with a signal peptide of 28 amino acids at the N-terminus, followed by a long collagenous domain of approximately 1400 residues of Gly-Xaa-Yaa repeats and a C-terminal noncollagenous domain (NC1) of approximately 230 residues (right panel).