<unk> ,<unk> <unk> , alpha 1 (Ehlers-Danlos syndrome<unk>  IV, autosomal dominant), also known as COL3A1, is a human gene.
This gene encodes a fibrillar<unk>  that is found in extensible connective tissues such as skin, lung, and the vascular system, frequently in association with<unk>  I<unk> . Mutations in this gene are associated with Ehlers-Danlos syndrome<unk>  IV, and with aortic and arterial aneurysms. Although alternate transcripts have been detected for this gene, they are the result of mutations; these mutations alter splicing, often leading to the exclusion of multiple exons.<unk>  is a fibrous scleroprotein in bone, cartilage, tendon, bone marrow stroma  and other connective tissue; yields gelatin on boiling.
Scleroprotein is a simple protein found in horny and cartilaginous tissues and in the lens of the eye.
Type-III collagen
Type-II collagen
Collectin
Fibrous protein
Internal elastic lamina
Sarcoglycan
Dermatan sulfate
Heparan sulfate