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Background: | Natural human C4a is prepared by cleavage of human C4 protein by human C1s. C4a is a member of the anaphylatoxin family of three proteins (C3a, C4a and C5a) produced by the activation of complement. Many of the biological functions of C4a are similar to those of C3a, but the specific activities are far below those of C3a. |
Storage: | -70℃ or below. Avoid freeze/thaw. |
Source: | Normal human serum |
Activity: | >80% versus normal human serum standard |
Purity: | >95% by SDS-PAGE, (Presence of des Arg: < 3 %) |
Molecular Weight: Size: | 8,759 Da (single chain) 50 µg/vial |
Concentration: | 0.5 mg/ml |
Buffer: | HEPES buffered saline, pH 7.2 (No carrier protein) |
Preservative: | None, 0.22 µm filtered |