PLASMA PROCARBOXYPEPTIDASE B
\plˈazmə pɹˈɒkɑːbˌɒksa͡ɪpptˌɪde͡ɪs bˈiː], \plˈazmə pɹˈɒkɑːbˌɒksaɪpptˌɪdeɪs bˈiː], \p_l_ˈa_z_m_ə p_ɹ_ˈɒ_k_ɑː_b_ˌɒ_k_s_aɪ_p_p_t_ˌɪ_d_eɪ_s b_ˈiː]\
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A metallocarboxypeptidase that removes C-terminal lysine and arginine from biologically active peptides and proteins thereby regulating their activity. It is a zinc enzyme with no preference shown for lysine over arginine. Pro-carboxypeptidase U in human plasma is activated by thrombin or plasmin during clotting to form the unstable carboxypeptidase U.
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