| C1q |
a six-subunit molecule, comprising 18 polypeptide chains, having the shape of six parallel rods flaring apart from each other at one end to terminate in a flower bunch arrangement, the globular head of each rod resembling a tulip; binding of the heads to IgM or IgG initiates the classical complement pathway, which continues by binding of two molecules each of C1r and C1s by C1q.
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| C1q n. |
a type of immune complex glomerulonephritis with deposits of complement component C1q; signs and symptoms are similar to those of minimal change disease or mild focal segmental glomerulosclerosis.
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