Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) C3 glomerulopathy ?
    ### Response:
    C3 glomerulopathy is a group of related conditions that cause the kidneys to malfunction. The major features of C3 glomerulopathy include high levels of protein in the urine (proteinuria), blood in the urine (hematuria), reduced amounts of urine, low levels of protein in the blood, and swelling in many areas of the body.
    