I am reading a paper and I have come across the following statement:
"Plasmids encoding full-length NCAM140 and NCAM140Δcys, intracellular domain of NCAM140, and the NCAM140ID729–750 fragment were as described".
I know that NCAM140 is an isoform of the NCAM protein with a molecular weight of 140kDa. However, I am not sure what Δcys means in NCAM140Δcys. Any insights are appreciated.