Chains and heterogens:
PDB Chain Sequences:
>2eckA (A:) mriillgapgagkgtqaqfimekygipqistgdmlraavksgselgkqakdimdagklvt delvialvkeriaqedcrngflldgfprtipqadamkeaginvdyvlefdvpdelivdri vgrrvhapsgrvyhvkfnppkvegkddvtgeelttrkddqeetvrkrlveyhqmtaplig yyskeaeagntkyakvdgtkpvaevradlekilg
>2eckB (B:) mriillgapgagkgtqaqfimekygipqistgdmlraavksgselgkqakdimdagklvt delvialvkeriaqedcrngflldgfprtipqadamkeaginvdyvlefdvpdelivdri vgrrvhapsgrvyhvkfnppkvegkddvtgeelttrkddqeetvrkrlveyhqmtaplig yyskeaeagntkyakvdgtkpvaevradlekilg