For number 1, if you are worry about reviewers, you have to do two things: 1 . Mass spec will tell you where the modification is. 2. For your gene of interest, you can use different but well know histone acetylation or methylation marker doing chromatin IP. Both require experience and special training to do them right though. Even if you can find specific actylated ab for the resiude, reviewers will ask for these two experiments for a good journal. As for as I know, histone H3 K9 Chip is very common. For number 2, acetylation is very stable if you have significant increase using chemical inhibitors. If you want to look at responses to different conditions, I will recommend adding 0.5 microM of the HDAC inhibitor TSA into the LYSIS BUFFER (same theory using phosphatase inhibitor for phos- residues).
【在 A******y 的大作中提到】 : For number 1, if you are worry about reviewers, you have to do two things: 1 : . Mass spec will tell you where the modification is. 2. For your gene of : interest, you can use different but well know histone acetylation or : methylation marker doing chromatin IP. Both require experience and special : training to do them right though. Even if you can find specific actylated : ab for the resiude, reviewers will ask for these two experiments for a good : journal. As for as I know, histone H3 K9 Chip is very common. : For number 2, acetylation is very stable if you have significant increase : using chemical inhibitors. If you want to look at responses to different : conditions, I will recommend adding 0.5 microM of the HDAC inhibitor TSA
1. Polyclonal Abs would be less specific to Ac-K9. Hypothetically, an Ab could grab AA4-AA8 regardless antigens have Ac-K9 and Ac-K12 or not. To get Ac-site-specific Abs you'll have to make them, affinity-purify and confirm them with those peptides.
【在 T****O 的大作中提到】 : 1. Polyclonal Abs would be less specific to Ac-K9. Hypothetically, an Ab : could grab AA4-AA8 regardless antigens have Ac-K9 and Ac-K12 or not. : To get Ac-site-specific Abs you'll have to make them, affinity-purify and : confirm them with those peptides.
h*b
24 楼
非常感谢!你说的没错,把每一个only use this server都选定,问题就解决了。我大 概测试了一下,没有问题。 请收一个包子!
【在 u******a 的大作中提到】 : 不用吧, preference-account底下有个选项是only use this server可破.
A*y
25 楼
If that's what you want to do, you have to do both positive mutant (Lysine to arginine) and negative mutant. Although, how many copies of histone H3 are there in human? I know for histone H4 there are more than 14 different coding regions.