passages.id: split_5_test_3006_passage
passages.type: progene_text
passages.text: Short - chain - length ( SCL ) PHAs consist of monomer units of C3 to C5 , medium - chain - length ( MCL ) PHAs consist of monomer units of C6 to C14 , and SCL-MCL PHAs consist of monomers ranging in size from C4 to C14 .