This is what i found in uscis.gov
http://uscis.gov/graphics/lawsregs/handbook/ac21intrm122705.pdf
Question 10. Should service centers or district offices deny portability cases on the sole
basis that the alien has left his or her employment with the I-140 petitioner prior to the
I-485 application pending for 180 days?
Answer: No. The basis for adjustment is not actual (current) employment but prospective
employment. Since there is no requirement that the alien have ever been employed by the petitioner
while the I-140 and/or I-485 was pending, the fact that an alien left the I-140 petitioner before the I-
485 has been pending 180 days will not necessarily render the alien ineligible to port. However, in all
cases an offer of employment must have been bona fide. This means that, as of the time the I-140
was filed and at the time of filing the I-485 if not filed concurrently, the I-140 petitioner must have
had the intent to employ the beneficiary, and the alien must have intended to undertake the
employment, upon adjustment. Adjudicators should not presume absence of such intent and may
take the I-140 and supporting documents themselves as prima facie evidence of such intent, but in
appropriate cases additional evidence or investigation may be appropriate.
According to this I can apply for AC21 right.
Correct me if I am interpreting it wrong.
Minicooper.