HEM2_SPIOL 433 ALA1 Catalyzes an early step in the biosynthesis of tetrapyrroles. Binds two molecules of 5-aminolevulinate per subunit, each at a distinct site, and catalyzes their condensation to form porphobilinogen (By similarity). Delta-aminolevulinic acid dehydratase, chloroplastic Porphobilinogen synthase MASTFNIPCNAGTIKNFNNSQRNLGFSSNLGINFAKTRFSNCGDSGRIPSQLVVRASERRDNLTQQKTGLSIEECEAAVVAGNAPSAPPVPPTPKAPSGTPSVSPLSLGRRPRRNRTSPVFRAAFQETTLSPANVVYPLFIHEGEEDTPIGAMPGCYRLGWRHGLVEEVAKARDVVVNSIVVFPKPDALKSPTGDEAYNENGLVPRTIRMLKDKFPDLIIYTDVALDPYYYDGHDGIVTQHGVIMNDETVHQLCKQAVAQARAGADVVSPSDMMDGRVGAIRAALDAEGYSNVSIMSYTAKYASSFYGPFREALDSNPRFGDKKTYQMNPANYREALIETQEDESEGADILLVKPGLPYLDIIRLLRDNSDLPIAAYQVSGEYSMIKAGGVLKMIDEEKVMLESLLCLRRAGADIILTYFALQAARCLCGEKR HEMB