Protein a has a ka=6.0 μm−1ka=6.0 μm−1 for binding ligand l, and protein b has a kd=4.0 μmkd=4.0 μm for binding of l. based on this information, which statement is true? the kaka of protein b for l is 0.25 μm−10.25 μm−1 . protein b binds l with higher affinity. protein a is half‑saturated with l when [l]=6.0 μm−1[l]=6.0 μm−1 . when [l]=1 μm[l]=1 μm , y=0.17y=0.17 for protein a.