I was recently chastised by my supervisor for describing something as being something else.
"Species A has genes X1, X2 and X3, Species B has genes Y1 and Y2. Protein X3 being the homolog of Y1"
I was told that "being" is plain incorrect but I do not understand why, it reads perfectly fine to me.
The proposed revision was:
"Protein X3 is the homolog of Protein Y1"
Why is this more correct?