Add term von-Willerbrand-factor-A-domain-rich collagen trimer

[DaiqingChen]

Please provide as much information as you can:

• Suggested term label:
  von-Willerbrand-factor-A-domain-rich collagen trimer

• Definition (free text)
  A family of collagens containing multiple von Willebrand factor A (vWA) domains

• Reference, in format PMID:#######
  PMID: 21421911

• Gene product name and ID to be annotated to this term
  annotations of all child terms

• Parent term(s)
  Collagen trimer (GO:0005581)

• Children terms (if applicable) Should any existing terms that should be moved underneath this new proposed term?
  Collagen type VI trimer (GO:0005589)
  Collagen type VII trimer (GO:0005590)
  Collagen type XXVIII trimer (GO:19990326)

• Synonyms (please specify, EXACT, BROAD, NARROW or RELATED)

• Cross-references

• For enzymes, please provide RHEA and/or EC numbers.

• Can also provide MetaCyc, KEGG, Wikipedia, and other links.

• Any other information
  See slides 4 and 8: https://docs.google.com/presentation/d/1zxL0gt5vOynmJsS8BP-Xqs_0sTaEB8Zo/edit?usp=sharing&ouid=109267399050361021326&rtpof=true&sd=true

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Slide screenshots:

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[Matrisome]

@DaiqingChen : Please update with screenshot of revised slide 4