Kinase activities of Tel1p and Mec1p. (a) Kinase
activity of immunoprecipitated HA-tagged Tel1p on PHAS-I. Products of a
kinase reaction using labeled ATP were analyzed by SDS/PAGE. Strains
from which immunoprecipitates were derived: lane 1, JMY48
(high-copy-number plasmid with TEL1-HA); lane 2, mock
immunoprecipitate (no anti-HA antibody) from JMY48; lane 3, JMY103
[high-copy number plasmid with tel1-HA(KD)]; lane 4,
KRY22 (TEL1-HA in single chromosomal copy); and lane 5,
JMY303–2a (tel1 strain, no epitope-tagged Tel1p).
(b) Kinase activity of immunoprecipitated HA-tagged
Mec1p on PHAS-I. Strains from which immunoprecipitates were derived:
lane 1, JMY312–8c (tel1 sml1∷HIS3
MEC1-HA); lane 2, JMY313–9a [tel1 mec1-HA(KD)
sml1∷HIS3]; and lane 3, mock
immunoprecipitate (no HA-antibody) from JMY312–8c. (c)
Western analysis of HA-tagged Tel1p and Mec1p proteins.
Immunoprecipitated HA-tagged Tel1p or Mec1p were examined by Western
analysis using HA.11 antibody and a secondary antibody-horseradish
peroxidase conjugate. Lane 1, JMY48 (high-copy number plasmid with
TEL1-HA); lane 2, JMY103 [high-copy number plasmid with
tel1-HA(KD)]; lane 3, JMY312–8c
(MEC1-HA); and lane 4, JMY313–9a
[mec1-HA(KD)]. Wt, wild type; kd, kinase dead.